21333000123012 has 24 divisors (see below), whose sum is σ = 50593016686912. Its totient is φ = 6994426269600.

The previous prime is 21333000122977. The next prime is 21333000123049. The reversal of 21333000123012 is 21032100033312.

It is a self number, because there is not a number n which added to its sum of digits gives 21333000123012.

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, 14571720664 + ... + 14571722127.

Almost surely, 2^{21333000123012} is an apocalyptic number.

It is an amenable number.

21333000123012 is an abundant number, since it is smaller than the sum of its proper divisors (29260016563900).

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

21333000123012 is a wasteful number, since it uses less digits than its factorization.

21333000123012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29143442859 (or 29143442857 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 21.

Adding to 21333000123012 its reverse (21032100033312), we get a palindrome (42365100156324).

The spelling of 21333000123012 in words is "twenty-one trillion, three hundred thirty-three billion, one hundred twenty-three thousand, twelve".