21321112302 has 32 divisors (see below), whose sum is σ = 54148857600. Its totient is φ = 6091746264.

The previous prime is 21321112279. The next prime is 21321112321. The reversal of 21321112302 is 20321112312.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28202152 + ... + 28202907.

It is an arithmetic number, because the mean of its divisors is an integer number (1692151800).

Almost surely, 2^21321112302 is an apocalyptic number.

21321112302 is an abundant number, since it is smaller than the sum of its proper divisors (32827745298).

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

21321112302 is a wasteful number, since it uses less digits than its factorization.

21321112302 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56405077 (or 56405071 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 21321112302 its reverse (20321112312), we get a palindrome (41642224614).

The spelling of 21321112302 in words is "twenty-one billion, three hundred twenty-one million, one hundred twelve thousand, three hundred two".