21131202232 has 32 divisors (see below), whose sum is σ = 47944746720. Its totient is φ = 8523509760.

The previous prime is 21131202227. The next prime is 21131202247. The reversal of 21131202232 is 23220213112.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11097369 + ... + 11099272.

It is an arithmetic number, because the mean of its divisors is an integer number (1498273335).

Almost surely, 2^21131202232 is an apocalyptic number.

It is an amenable number.

21131202232 is an abundant number, since it is smaller than the sum of its proper divisors (26813544488).

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

21131202232 is a wasteful number, since it uses less digits than its factorization.

21131202232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22196671 (or 22196667 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 21131202232 its reverse (23220213112), we get a palindrome (44351415344).

The spelling of 21131202232 in words is "twenty-one billion, one hundred thirty-one million, two hundred two thousand, two hundred thirty-two".