21012233211312 has 80 divisors (see below), whose sum is σ = 62089095305472. Its totient is φ = 5998368280320.

The previous prime is 21012233211311. The next prime is 21012233211349. The reversal of 21012233211312 is 21311233221012.

It is a super-2 number, since 2×21012233211312² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is not an unprimeable number, because it can be changed into a prime (21012233211311) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26308683 + ... + 27095594.

Almost surely, 2^{21012233211312} is an apocalyptic number.

It is an amenable number.

21012233211312 is an abundant number, since it is smaller than the sum of its proper divisors (41076862094160).

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

21012233211312 is a wasteful number, since it uses less digits than its factorization.

21012233211312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53405466 (or 53405460 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 24.

Adding to 21012233211312 its reverse (21311233221012), we get a palindrome (42323466432324).

The spelling of 21012233211312 in words is "twenty-one trillion, twelve billion, two hundred thirty-three million, two hundred eleven thousand, three hundred twelve".