21023031124 has 12 divisors (see below), whose sum is σ = 36865237248. Its totient is φ = 10490106200.

The previous prime is 21023031119. The next prime is 21023031131. The reversal of 21023031124 is 42113032012.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5350132 + ... + 5354059.

It is an arithmetic number, because the mean of its divisors is an integer number (3072103104).

Almost surely, 2^21023031124 is an apocalyptic number.

It is an amenable number.

21023031124 is a deficient number, since it is larger than the sum of its proper divisors (15842206124).

21023031124 is a wasteful number, since it uses less digits than its factorization.

21023031124 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10704686 (or 10704684 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 21023031124 its reverse (42113032012), we get a palindrome (63136063136).

The spelling of 21023031124 in words is "twenty-one billion, twenty-three million, thirty-one thousand, one hundred twenty-four".