21021022132 has 48 divisors (see below), whose sum is σ = 42290688384. Its totient is φ = 9049040000.

The previous prime is 21021022129. The next prime is 21021022151. The reversal of 21021022132 is 23122012012.

It is a happy number.

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, 619 + ... + 205042.

It is an arithmetic number, because the mean of its divisors is an integer number (881056008).

Almost surely, 2^21021022132 is an apocalyptic number.

21021022132 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

21021022132 is an abundant number, since it is smaller than the sum of its proper divisors (21269666252).

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

21021022132 is a wasteful number, since it uses less digits than its factorization.

21021022132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 205800 (or 205798 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 16.

Adding to 21021022132 its reverse (23122012012), we get a palindrome (44143034144).

The spelling of 21021022132 in words is "twenty-one billion, twenty-one million, twenty-two thousand, one hundred thirty-two".