21312013233330 has 96 divisors (see below), whose sum is σ = 55450717305984. Its totient is φ = 5679155459328.

The previous prime is 21312013233281. The next prime is 21312013233409. The reversal of 21312013233330 is 3333231021312.

21312013233330 is a `hidden beast` number, since 2 + 1 + 3 + 1 + 2 + 0 + 1 + 323 + 3 + 330 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 21312013233294 and 21312013233303.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 899722747 + ... + 899746433.

It is an arithmetic number, because the mean of its divisors is an integer number (577611638604).

Almost surely, 2^{21312013233330} is an apocalyptic number.

21312013233330 is an abundant number, since it is smaller than the sum of its proper divisors (34138704072654).

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

21312013233330 is a wasteful number, since it uses less digits than its factorization.

21312013233330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30400 (or 30397 counting only the distinct ones).

The product of its (nonzero) digits is 5832, while the sum is 27.

Adding to 21312013233330 its reverse (3333231021312), we get a palindrome (24645244254642).

The spelling of 21312013233330 in words is "twenty-one trillion, three hundred twelve billion, thirteen million, two hundred thirty-three thousand, three hundred thirty".