21130313124 has 96 divisors (see below), whose sum is σ = 51788685312. Its totient is φ = 6697152000.

The previous prime is 21130313111. The next prime is 21130313129. The reversal of 21130313124 is 42131303112.

It is a super-3 number, since 3×21130313124³ (a number of 32 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 21130313124.

It is not an unprimeable number, because it can be changed into a prime (21130313129) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 8741164 + ... + 8743580.

It is an arithmetic number, because the mean of its divisors is an integer number (539465472).

Almost surely, 2^21130313124 is an apocalyptic number.

It is an amenable number.

21130313124 is an abundant number, since it is smaller than the sum of its proper divisors (30658372188).

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

21130313124 is a wasteful number, since it uses less digits than its factorization.

21130313124 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2857 (or 2855 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 21.

Adding to 21130313124 its reverse (42131303112), we get a palindrome (63261616236).

The spelling of 21130313124 in words is "twenty-one billion, one hundred thirty million, three hundred thirteen thousand, one hundred twenty-four".