21130213132 has 24 divisors (see below), whose sum is σ = 43291170720. Its totient is φ = 8834931840.

The previous prime is 21130213127. The next prime is 21130213163. The reversal of 21130213132 is 23131203112.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9201907 + ... + 9204202.

It is an arithmetic number, because the mean of its divisors is an integer number (1803798780).

Almost surely, 2^21130213132 is an apocalyptic number.

It is an amenable number.

21130213132 is an abundant number, since it is smaller than the sum of its proper divisors (22160957588).

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

21130213132 is a wasteful number, since it uses less digits than its factorization.

21130213132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18406161 (or 18406159 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 21130213132 its reverse (23131203112), we get a palindrome (44261416244).

The spelling of 21130213132 in words is "twenty-one billion, one hundred thirty million, two hundred thirteen thousand, one hundred thirty-two".