21102100332 has 48 divisors (see below), whose sum is σ = 50593966080. Its totient is φ = 6840545472.

The previous prime is 21102100309. The next prime is 21102100333. The reversal of 21102100332 is 23300120112.

It is not an unprimeable number, because it can be changed into a prime (21102100333) 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, 983503 + ... + 1004729.

It is an arithmetic number, because the mean of its divisors is an integer number (1054040960).

Almost surely, 2^21102100332 is an apocalyptic number.

It is an amenable number.

21102100332 is an abundant number, since it is smaller than the sum of its proper divisors (29491865748).

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

21102100332 is a wasteful number, since it uses less digits than its factorization.

21102100332 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23510 (or 23508 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 15.

Adding to 21102100332 its reverse (23300120112), we get a palindrome (44402220444).

The spelling of 21102100332 in words is "twenty-one billion, one hundred two million, one hundred thousand, three hundred thirty-two".