1213201101000 has 256 divisors, whose sum is σ = 4330474536960. Its totient is φ = 277011705600.

The previous prime is 1213201100981. The next prime is 1213201101019. The reversal of 1213201101000 is 1011023121.

It is an interprime number because it is at equal distance from previous prime (1213201100981) and next prime (1213201101019).

It is a super-2 number, since 2×1213201101000² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 20277129 + ... + 20336871.

It is an arithmetic number, because the mean of its divisors is an integer number (16915916160).

Almost surely, 2^{1213201101000} is an apocalyptic number.

1213201101000 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 1213201101000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2165237268480).

1213201101000 is an abundant number, since it is smaller than the sum of its proper divisors (3117273435960).

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

1213201101000 is a wasteful number, since it uses less digits than its factorization.

1213201101000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60741 (or 60727 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 12.

Adding to 1213201101000 its reverse (1011023121), we get a palindrome (1214212124121).

The spelling of 1213201101000 in words is "one trillion, two hundred thirteen billion, two hundred one million, one hundred one thousand".