21123232024 has 16 divisors (see below), whose sum is σ = 39612370320. Its totient is φ = 10559933280.

The previous prime is 21123231953. The next prime is 21123232049. The reversal of 21123232024 is 42023232112.

It is a super-2 number, since 2×21123232024² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21123231986 and 21123232004.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 156172 + ... + 258139.

It is an arithmetic number, because the mean of its divisors is an integer number (2475773145).

Almost surely, 2^21123232024 is an apocalyptic number.

It is an amenable number.

21123232024 is a deficient number, since it is larger than the sum of its proper divisors (18489138296).

21123232024 is a wasteful number, since it uses less digits than its factorization.

21123232024 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 420690 (or 420686 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 22.

Adding to 21123232024 its reverse (42023232112), we get a palindrome (63146464136).

The spelling of 21123232024 in words is "twenty-one billion, one hundred twenty-three million, two hundred thirty-two thousand, twenty-four".