21121200102122 has 128 divisors (see below), whose sum is σ = 35048192486400. Its totient is φ = 9512299929600.

The previous prime is 21121200102113. The next prime is 21121200102181. The reversal of 21121200102122 is 22120100212112.

It is a super-2 number, since 2×21121200102122² (a number of 27 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 21121200102122.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 5056545698 + ... + 5056549874.

It is an arithmetic number, because the mean of its divisors is an integer number (273814003800).

Almost surely, 2^{21121200102122} is an apocalyptic number.

21121200102122 is a deficient number, since it is larger than the sum of its proper divisors (13926992384278).

21121200102122 is a wasteful number, since it uses less digits than its factorization.

21121200102122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4912.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 21121200102122 its reverse (22120100212112), we get a palindrome (43241300314234).

The spelling of 21121200102122 in words is "twenty-one trillion, one hundred twenty-one billion, two hundred million, one hundred two thousand, one hundred twenty-two".