21023003121204 has 24 divisors (see below), whose sum is σ = 56061341656768. Its totient is φ = 6006572320320.

The previous prime is 21023003121193. The next prime is 21023003121221. The reversal of 21023003121204 is 40212130032012.

It is a Harshad number since it is a multiple of its sum of digits (21).

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, 125136923257 + ... + 125136923424.

Almost surely, 2^{21023003121204} is an apocalyptic number.

It is an amenable number.

21023003121204 is an abundant number, since it is smaller than the sum of its proper divisors (35038338535564).

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

21023003121204 is a wasteful number, since it uses less digits than its factorization.

21023003121204 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 250273846695 (or 250273846693 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 21.

Adding to 21023003121204 its reverse (40212130032012), we get a palindrome (61235133153216).

The spelling of 21023003121204 in words is "twenty-one trillion, twenty-three billion, three million, one hundred twenty-one thousand, two hundred four".