21131131032 has 48 divisors (see below), whose sum is σ = 62432889480. Its totient is φ = 6403372800.

The previous prime is 21131131001. The next prime is 21131131057. The reversal of 21131131032 is 23013113112.

21131131032 is a `hidden beast` number, since 2 + 11 + 311 + 310 + 32 = 666.

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

It is a junction number, because it is equal to n+sod(n) for n = 21131130996 and 21131131014.

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 11 ways as a sum of consecutive naturals, for example, 13339569 + ... + 13341152.

Almost surely, 2^21131131032 is an apocalyptic number.

21131131032 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

21131131032 is an abundant number, since it is smaller than the sum of its proper divisors (41301758448).

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

21131131032 is a wasteful number, since it uses less digits than its factorization.

21131131032 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26680744 (or 26680737 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 18.

Adding to 21131131032 its reverse (23013113112), we get a palindrome (44144244144).

The spelling of 21131131032 in words is "twenty-one billion, one hundred thirty-one million, one hundred thirty-one thousand, thirty-two".