21333320124 has 24 divisors (see below), whose sum is σ = 49791998928. Its totient is φ = 7109070720.

The previous prime is 21333320117. The next prime is 21333320147. The reversal of 21333320124 is 42102333312.

It is a super-2 number, since 2×21333320124² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21333320094 and 21333320103.

It is a congruent number.

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, 210537 + ... + 294944.

It is an arithmetic number, because the mean of its divisors is an integer number (2074666622).

Almost surely, 2^21333320124 is an apocalyptic number.

It is an amenable number.

21333320124 is an abundant number, since it is smaller than the sum of its proper divisors (28458678804).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21333320124 is a wasteful number, since it uses less digits than its factorization.

21333320124 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 509005 (or 509003 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 24.

Adding to 21333320124 its reverse (42102333312), we get a palindrome (63435653436).

The spelling of 21333320124 in words is "twenty-one billion, three hundred thirty-three million, three hundred twenty thousand, one hundred twenty-four".