21131252112304 has 40 divisors (see below), whose sum is σ = 41896123248320. Its totient is φ = 10319374997568.

The previous prime is 21131252112263. The next prime is 21131252112403. The reversal of 21131252112304 is 40321125213112.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12546127 + ... + 14130385.

It is an arithmetic number, because the mean of its divisors is an integer number (1047403081208).

Almost surely, 2^{21131252112304} is an apocalyptic number.

It is an amenable number.

21131252112304 is a deficient number, since it is larger than the sum of its proper divisors (20764871136016).

21131252112304 is a wasteful number, since it uses less digits than its factorization.

21131252112304 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1603697 (or 1603691 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 28.

Adding to 21131252112304 its reverse (40321125213112), we get a palindrome (61452377325416).

The spelling of 21131252112304 in words is "twenty-one trillion, one hundred thirty-one billion, two hundred fifty-two million, one hundred twelve thousand, three hundred four".