21024131235344 has 80 divisors (see below), whose sum is σ = 42113575183680. Its totient is φ = 10163300206080.

The previous prime is 21024131235337. The next prime is 21024131235409. The reversal of 21024131235344 is 44353213142012.

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, 15299867 + ... + 16617285.

It is an arithmetic number, because the mean of its divisors is an integer number (526419689796).

Almost surely, 2^{21024131235344} is an apocalyptic number.

It is an amenable number.

21024131235344 is an abundant number, since it is smaller than the sum of its proper divisors (21089443948336).

21024131235344 is a wasteful number, since it uses less digits than its factorization.

21024131235344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1317768 (or 1317762 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 35.

Adding to 21024131235344 its reverse (44353213142012), we get a palindrome (65377344377356).

The spelling of 21024131235344 in words is "twenty-one trillion, twenty-four billion, one hundred thirty-one million, two hundred thirty-five thousand, three hundred forty-four".