21023012211312 has 80 divisors (see below), whose sum is σ = 57593001169152. Its totient is φ = 6585260743680.

The previous prime is 21023012211283. The next prime is 21023012211343. The reversal of 21023012211312 is 21311221032012.

It is a super-2 number, since 2×21023012211312² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19382014 + ... + 20437917.

Almost surely, 2^{21023012211312} is an apocalyptic number.

It is an amenable number.

21023012211312 is an abundant number, since it is smaller than the sum of its proper divisors (36569988957840).

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

21023012211312 is a wasteful number, since it uses less digits than its factorization.

21023012211312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39820606 (or 39820600 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 21.

Adding to 21023012211312 its reverse (21311221032012), we get a palindrome (42334233243324).

The spelling of 21023012211312 in words is "twenty-one trillion, twenty-three billion, twelve million, two hundred eleven thousand, three hundred twelve".