122121155 has 16 divisors (see below), whose sum is σ = 158219040. Its totient is φ = 89952768.

The previous prime is 122121119. The next prime is 122121187. The reversal of 122121155 is 551121221.

It is a cyclic number.

It is not a de Polignac number, because 122121155 - 2²⁴ = 105343939 is a prime.

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, 25976 + ... + 30314.

It is an arithmetic number, because the mean of its divisors is an integer number (9888690).

Almost surely, 2^122121155 is an apocalyptic number.

122121155 is a deficient number, since it is larger than the sum of its proper divisors (36097885).

122121155 is a wasteful number, since it uses less digits than its factorization.

122121155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4790.

The product of its digits is 200, while the sum is 20.

The square root of 122121155 is about 11050.8440854081. The cubic root of 122121155 is about 496.1316895278.

Adding to 122121155 its reverse (551121221), we get a palindrome (673242376).

The spelling of 122121155 in words is "one hundred twenty-two million, one hundred twenty-one thousand, one hundred fifty-five".