122111201220111 has 12 divisors (see below), whose sum is σ = 176519471201320. Its totient is φ = 81344409790320.

The previous prime is 122111201220103. The next prime is 122111201220137. The reversal of 122111201220111 is 111022102111221.

It is a happy number.

122111201220111 is a `hidden beast` number, since 1 + 2 + 211 + 120 + 1 + 220 + 111 = 666.

It is not a de Polignac number, because 122111201220111 - 2³ = 122111201220103 is a prime.

It is a super-2 number, since 2×122111201220111² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122111201220101) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5254795216 + ... + 5254818453.

Almost surely, 2^{122111201220111} is an apocalyptic number.

122111201220111 is a deficient number, since it is larger than the sum of its proper divisors (54408269981209).

122111201220111 is a wasteful number, since it uses less digits than its factorization.

122111201220111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10509614966 (or 10509614963 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 18.

Adding to 122111201220111 its reverse (111022102111221), we get a palindrome (233133303331332).

The spelling of 122111201220111 in words is "one hundred twenty-two trillion, one hundred eleven billion, two hundred one million, two hundred twenty thousand, one hundred eleven".