21302232312 has 32 divisors (see below), whose sum is σ = 53263890000. Its totient is φ = 7099636224.

The previous prime is 21302232277. The next prime is 21302232319. The reversal of 21302232312 is 21323220312.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21302232319) 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 7 ways as a sum of consecutive naturals, for example, 95814 + ... + 227562.

Almost surely, 2^21302232312 is an apocalyptic number.

It is an amenable number.

21302232312 is an abundant number, since it is smaller than the sum of its proper divisors (31961657688).

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

21302232312 is a wasteful number, since it uses less digits than its factorization.

21302232312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 138495 (or 138491 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 21.

Adding to 21302232312 its reverse (21323220312), we get a palindrome (42625452624).

The spelling of 21302232312 in words is "twenty-one billion, three hundred two million, two hundred thirty-two thousand, three hundred twelve".