21302331012 has 72 divisors (see below), whose sum is σ = 55330766400. Its totient is φ = 6905383488.

The previous prime is 21302330971. The next prime is 21302331019. The reversal of 21302331012 is 21013320312.

21302331012 is a `hidden beast` number, since 21 + 302 + 331 + 0 + 12 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (21302331019) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4711689 + ... + 4716207.

Almost surely, 2^21302331012 is an apocalyptic number.

It is an amenable number.

21302331012 is an abundant number, since it is smaller than the sum of its proper divisors (34028435388).

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

21302331012 is a wasteful number, since it uses less digits than its factorization.

21302331012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8105 (or 8100 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

Adding to 21302331012 its reverse (21013320312), we get a palindrome (42315651324).

The spelling of 21302331012 in words is "twenty-one billion, three hundred two million, three hundred thirty-one thousand, twelve".