122111122200021 has 24 divisors (see below), whose sum is σ = 177056770176000. Its totient is φ = 81096332114016.

The previous prime is 122111122200007. The next prime is 122111122200073. The reversal of 122111122200021 is 120002221111221.

It is not a de Polignac number, because 122111122200021 - 2³⁵ = 122076762461653 is a prime.

It is a super-2 number, since 2×122111122200021² (a number of 29 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 122111122199967 and 122111122200003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122111122400021) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 130872855 + ... + 131802603.

It is an arithmetic number, because the mean of its divisors is an integer number (7377365424000).

Almost surely, 2^{122111122200021} is an apocalyptic number.

It is an amenable number.

122111122200021 is a deficient number, since it is larger than the sum of its proper divisors (54945647975979).

122111122200021 is a wasteful number, since it uses less digits than its factorization.

122111122200021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 985505 (or 985502 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 122111122200021 its reverse (120002221111221), we get a palindrome (242113343311242).

The spelling of 122111122200021 in words is "one hundred twenty-two trillion, one hundred eleven billion, one hundred twenty-two million, two hundred thousand, twenty-one".