21003321123102 has 32 divisors (see below), whose sum is σ = 43759508981760. Its totient is φ = 6713106478560.

The previous prime is 21003321123067. The next prime is 21003321123143. The reversal of 21003321123102 is 20132112330012.

It is a super-2 number, since 2×21003321123102² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 517966338 + ... + 518006885.

It is an arithmetic number, because the mean of its divisors is an integer number (1367484655680).

Almost surely, 2^{21003321123102} is an apocalyptic number.

21003321123102 is an abundant number, since it is smaller than the sum of its proper divisors (22756187858658).

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

21003321123102 is a wasteful number, since it uses less digits than its factorization.

21003321123102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1035973368.

The product of its (nonzero) digits is 432, while the sum is 21.

Adding to 21003321123102 its reverse (20132112330012), we get a palindrome (41135433453114).

The spelling of 21003321123102 in words is "twenty-one trillion, three billion, three hundred twenty-one million, one hundred twenty-three thousand, one hundred two".