21311233130 has 32 divisors (see below), whose sum is σ = 41856092928. Its totient is φ = 7747950400.

The previous prime is 21311233127. The next prime is 21311233159. The reversal of 21311233130 is 3133211312.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 609215 + ... + 643245.

It is an arithmetic number, because the mean of its divisors is an integer number (1308002904).

Almost surely, 2^21311233130 is an apocalyptic number.

21311233130 is a deficient number, since it is larger than the sum of its proper divisors (20544859798).

21311233130 is a wasteful number, since it uses less digits than its factorization.

21311233130 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39742.

The product of its (nonzero) digits is 324, while the sum is 20.

Adding to 21311233130 its reverse (3133211312), we get a palindrome (24444444442).

The spelling of 21311233130 in words is "twenty-one billion, three hundred eleven million, two hundred thirty-three thousand, one hundred thirty".