21312033331332 has 96 divisors (see below), whose sum is σ = 52705262776320. Its totient is φ = 6692049786240.

The previous prime is 21312033331273. The next prime is 21312033331397. The reversal of 21312033331332 is 23313333021312.

It is a super-2 number, since 2×21312033331332² (a number of 27 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 21312033331332.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2413219 + ... + 6960437.

It is an arithmetic number, because the mean of its divisors is an integer number (549013153920).

Almost surely, 2^{21312033331332} is an apocalyptic number.

It is an amenable number.

21312033331332 is an abundant number, since it is smaller than the sum of its proper divisors (31393229444988).

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

21312033331332 is a wasteful number, since it uses less digits than its factorization.

21312033331332 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4547593 (or 4547591 counting only the distinct ones).

The product of its (nonzero) digits is 17496, while the sum is 30.

Adding to 21312033331332 its reverse (23313333021312), we get a palindrome (44625366352644).

The spelling of 21312033331332 in words is "twenty-one trillion, three hundred twelve billion, thirty-three million, three hundred thirty-one thousand, three hundred thirty-two".