21312044021312 has 56 divisors (see below), whose sum is σ = 46137921838272. Its totient is φ = 9686832857600.

The previous prime is 21312044021293. The next prime is 21312044021363.

It is a happy number.

21312044021312 is nontrivially palindromic in base 10.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14345762 + ... + 15761502.

Almost surely, 2^{21312044021312} is an apocalyptic number.

21312044021312 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

21312044021312 is an abundant number, since it is smaller than the sum of its proper divisors (24825877816960).

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

21312044021312 is a wasteful number, since it uses less digits than its factorization.

21312044021312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1437147 (or 1437137 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 26.

It can be divided in two parts, 2131204 and 4021312, that added together give a palindrome (6152516).

The spelling of 21312044021312 in words is "twenty-one trillion, three hundred twelve billion, forty-four million, twenty-one thousand, three hundred twelve".