122211138 has 16 divisors (see below), whose sum is σ = 279339840. Its totient is φ = 34917456.

The previous prime is 122211091. The next prime is 122211157. The reversal of 122211138 is 831112221.

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

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1454853 + ... + 1454936.

It is an arithmetic number, because the mean of its divisors is an integer number (17458740).

Almost surely, 2^122211138 is an apocalyptic number.

122211138 is an abundant number, since it is smaller than the sum of its proper divisors (157128702).

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

122211138 is a wasteful number, since it uses less digits than its factorization.

122211138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2909801.

The product of its digits is 192, while the sum is 21.

The square root of 122211138 is about 11054.9146536733. The cubic root of 122211138 is about 496.2535151508.

Adding to 122211138 its reverse (831112221), we get a palindrome (953323359).

The spelling of 122211138 in words is "one hundred twenty-two million, two hundred eleven thousand, one hundred thirty-eight".