21103203122022 has 32 divisors (see below), whose sum is σ = 48242204704512. Its totient is φ = 6028697624544.

The previous prime is 21103203121967. The next prime is 21103203122147. The reversal of 21103203122022 is 22022130230112.

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

It is a self number, because there is not a number n which added to its sum of digits gives 21103203122022.

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, 32549413 + ... + 33191424.

It is an arithmetic number, because the mean of its divisors is an integer number (1507568897016).

Almost surely, 2^{21103203122022} is an apocalyptic number.

21103203122022 is an abundant number, since it is smaller than the sum of its proper divisors (27139001582490).

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

21103203122022 is a wasteful number, since it uses less digits than its factorization.

21103203122022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65748492.

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

Adding to 21103203122022 its reverse (22022130230112), we get a palindrome (43125333352134).

The spelling of 21103203122022 in words is "twenty-one trillion, one hundred three billion, two hundred three million, one hundred twenty-two thousand, twenty-two".