21531051130 has 32 divisors (see below), whose sum is σ = 39425849280. Its totient is φ = 8463638400.

The previous prime is 21531051127. The next prime is 21531051133. The reversal of 21531051130 is 3115013512.

21531051130 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (21531051127) and next prime (21531051133).

It is not an unprimeable number, because it can be changed into a prime (21531051133) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3334405 + ... + 3340855.

It is an arithmetic number, because the mean of its divisors is an integer number (1232057790).

Almost surely, 2^21531051130 is an apocalyptic number.

21531051130 is a deficient number, since it is larger than the sum of its proper divisors (17894798150).

21531051130 is a wasteful number, since it uses less digits than its factorization.

21531051130 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12174.

The product of its (nonzero) digits is 450, while the sum is 22.

Adding to 21531051130 its reverse (3115013512), we get a palindrome (24646064642).

The spelling of 21531051130 in words is "twenty-one billion, five hundred thirty-one million, fifty-one thousand, one hundred thirty".