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1211210000000 = 2757711313
BaseRepresentation
bin10001101000000001101…
…111011110011010000000
311021210100022022010001122
4101220001233132122000
5124321024230000000
62324231105451412
7153335625062540
oct21500157363200
94253308263048
101211210000000
11427742518000
121768a7940b68
138a2a7b8b1c0
14428a1261320
152178de0c085
hex11a01bde680

1211210000000 has 1024 divisors, whose sum is σ = 4083177047040. Its totient is φ = 348480000000.

The previous prime is 1211209999921. The next prime is 1211210000069. The reversal of 1211210000000 is 121121.

It is a Harshad number since it is a multiple of its sum of digits (8).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 93169999994 + ... + 93170000006.

It is an arithmetic number, because the mean of its divisors is an integer number (3987477585).

Almost surely, 21211210000000 is an apocalyptic number.

1211210000000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1211210000000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2041588523520).

1211210000000 is an abundant number, since it is smaller than the sum of its proper divisors (2871967047040).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1211210000000 is an frugal number, since it uses more digits than its factorization.

1211210000000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 102 (or 38 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 8.

Adding to 1211210000000 its reverse (121121), we get a palindrome (1211210121121).

1211210000000 divided by its reverse (121121) gives a 7-th power (10000000 = 107).

It can be divided in two parts, 121 and 1210000000, that added together give a palindrome (1210000121).

The spelling of 1211210000000 in words is "one trillion, two hundred eleven billion, two hundred ten million", and thus it is an aban number.