21112320102 has 32 divisors (see below), whose sum is σ = 44861234400. Its totient is φ = 6611125248.

The previous prime is 21112320071. The next prime is 21112320113. The reversal of 21112320102 is 20102321112.

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, 1633227 + ... + 1646102.

It is an arithmetic number, because the mean of its divisors is an integer number (1401913575).

Almost surely, 2^21112320102 is an apocalyptic number.

21112320102 is an abundant number, since it is smaller than the sum of its proper divisors (23748914298).

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

21112320102 is a wasteful number, since it uses less digits than its factorization.

21112320102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3279400.

The product of its (nonzero) digits is 48, while the sum is 15.

Adding to 21112320102 its reverse (20102321112), we get a palindrome (41214641214).

The spelling of 21112320102 in words is "twenty-one billion, one hundred twelve million, three hundred twenty thousand, one hundred two".