21313033032012 has 24 divisors (see below), whose sum is σ = 49731418662912. Its totient is φ = 7104200307600.

The previous prime is 21313033031923. The next prime is 21313033032017. The reversal of 21313033032012 is 21023033031312.

It is not an unprimeable number, because it can be changed into a prime (21313033032017) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17387164 + ... + 18572547.

It is an arithmetic number, because the mean of its divisors is an integer number (2072142444288).

Almost surely, 2^{21313033032012} is an apocalyptic number.

It is an amenable number.

21313033032012 is an abundant number, since it is smaller than the sum of its proper divisors (28418385630900).

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

21313033032012 is a wasteful number, since it uses less digits than its factorization.

21313033032012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36009109 (or 36009107 counting only the distinct ones).

The product of its (nonzero) digits is 1944, while the sum is 24.

Adding to 21313033032012 its reverse (21023033031312), we get a palindrome (42336066063324).

The spelling of 21313033032012 in words is "twenty-one trillion, three hundred thirteen billion, thirty-three million, thirty-two thousand, twelve".