1012221210000 has 1600 divisors, whose sum is σ = 4510767292416. Its totient is φ = 188697600000.

The previous prime is 1012221209959. The next prime is 1012221210001. The reversal of 1012221210000 is 121222101.

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

It is not an unprimeable number, because it can be changed into a prime (1012221210001) by changing a digit.

It is a polite number, since it can be written in 319 ways as a sum of consecutive naturals, for example, 1111109545 + ... + 1111110455.

Almost surely, 2^{1012221210000} is an apocalyptic number.

1012221210000 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 1012221210000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2255383646208).

1012221210000 is an abundant number, since it is smaller than the sum of its proper divisors (3498546082416).

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

1012221210000 is a wasteful number, since it uses less digits than its factorization.

1012221210000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1010 (or 989 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 1012221210000 its reverse (121222101), we get a palindrome (1012342432101).

It can be divided in two parts, 1012221 and 210000, that added together give a palindrome (1222221).

The spelling of 1012221210000 in words is "one trillion, twelve billion, two hundred twenty-one million, two hundred ten thousand".