21131130032 has 80 divisors (see below), whose sum is σ = 43072267008. Its totient is φ = 10023678720.

The previous prime is 21131130029. The next prime is 21131130049. The reversal of 21131130032 is 23003113112.

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 15 ways as a sum of consecutive naturals, for example, 34471358 + ... + 34471970.

Almost surely, 2^21131130032 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21131130032, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21536133504).

21131130032 is an abundant number, since it is smaller than the sum of its proper divisors (21941136976).

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

21131130032 is a wasteful number, since it uses less digits than its factorization.

21131130032 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1258 (or 1252 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 17.

Adding to 21131130032 its reverse (23003113112), we get a palindrome (44134243144).

The spelling of 21131130032 in words is "twenty-one billion, one hundred thirty-one million, one hundred thirty thousand, thirty-two".