21331202132 has 18 divisors (see below), whose sum is σ = 39654633102. Its totient is φ = 10038212224.

The previous prime is 21331202111. The next prime is 21331202153. The reversal of 21331202132 is 23120213312.

It is an interprime number because it is at equal distance from previous prime (21331202111) and next prime (21331202153).

It can be written as a sum of positive squares in 3 ways, for example, as 16107671056 + 5223531076 = 126916^2 + 72274^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 9225143 + ... + 9227454.

Almost surely, 2^21331202132 is an apocalyptic number.

It is an amenable number.

21331202132 is a deficient number, since it is larger than the sum of its proper divisors (18323430970).

21331202132 is a wasteful number, since it uses less digits than its factorization.

21331202132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18452635 (or 18452616 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 21331202132 its reverse (23120213312), we get a palindrome (44451415444).

The spelling of 21331202132 in words is "twenty-one billion, three hundred thirty-one million, two hundred two thousand, one hundred thirty-two".