21102320112 has 80 divisors (see below), whose sum is σ = 56036687232. Its totient is φ = 6838007040.

The previous prime is 21102320111. The next prime is 21102320191.

21102320112 is nontrivially palindromic in base 10.

It is a junction number, because it is equal to n+sod(n) for n = 21102320091 and 21102320100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21102320111) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2316687 + ... + 2325777.

Almost surely, 2^21102320112 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21102320112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28018343616).

21102320112 is an abundant number, since it is smaller than the sum of its proper divisors (34934367120).

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

21102320112 is a wasteful number, since it uses less digits than its factorization.

21102320112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10446 (or 10440 counting only the distinct ones).

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

The spelling of 21102320112 in words is "twenty-one billion, one hundred two million, three hundred twenty thousand, one hundred twelve".