21310031230 has 64 divisors (see below), whose sum is σ = 40154849280. Its totient is φ = 8134280064.

The previous prime is 21310031213. The next prime is 21310031269. The reversal of 21310031230 is 3213001312.

It is a congruent number.

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, 12813379 + ... + 12815041.

It is an arithmetic number, because the mean of its divisors is an integer number (627419520).

Almost surely, 2^21310031230 is an apocalyptic number.

21310031230 is a deficient number, since it is larger than the sum of its proper divisors (18844818050).

21310031230 is a wasteful number, since it uses less digits than its factorization.

21310031230 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2353.

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

Adding to 21310031230 its reverse (3213001312), we get a palindrome (24523032542).

The spelling of 21310031230 in words is "twenty-one billion, three hundred ten million, thirty-one thousand, two hundred thirty".