21102220332 has 48 divisors (see below), whose sum is σ = 54727367520. Its totient is φ = 7031771136.

The previous prime is 21102220291. The next prime is 21102220421. The reversal of 21102220332 is 23302220112.

21102220332 is a `hidden beast` number, since 2 + 110 + 2 + 220 + 332 = 666.

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

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, 317068 + ... + 377804.

It is an arithmetic number, because the mean of its divisors is an integer number (1140153490).

Almost surely, 2^21102220332 is an apocalyptic number.

It is an amenable number.

21102220332 is an abundant number, since it is smaller than the sum of its proper divisors (33625147188).

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

21102220332 is a wasteful number, since it uses less digits than its factorization.

21102220332 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63967 (or 63959 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

Adding to 21102220332 its reverse (23302220112), we get a palindrome (44404440444).

The spelling of 21102220332 in words is "twenty-one billion, one hundred two million, two hundred twenty thousand, three hundred thirty-two".