21003231130 has 64 divisors (see below), whose sum is σ = 45164044800. Its totient is φ = 7025424000.

The previous prime is 21003231107. The next prime is 21003231157. The reversal of 21003231130 is 3113230012.

It is a super-2 number, since 2×21003231130² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 65955 + ... + 215305.

It is an arithmetic number, because the mean of its divisors is an integer number (705688200).

Almost surely, 2^21003231130 is an apocalyptic number.

21003231130 is an abundant number, since it is smaller than the sum of its proper divisors (24160813670).

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

21003231130 is a wasteful number, since it uses less digits than its factorization.

21003231130 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 149420 (or 149406 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 16.

Adding to 21003231130 its reverse (3113230012), we get a palindrome (24116461142).

The spelling of 21003231130 in words is "twenty-one billion, three million, two hundred thirty-one thousand, one hundred thirty".