122771138 has 16 divisors (see below), whose sum is σ = 215599104. Its totient is φ = 51332640.

The previous prime is 122771081. The next prime is 122771147. The reversal of 122771138 is 831177221.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 106370 + ... + 107517.

It is an arithmetic number, because the mean of its divisors is an integer number (13474944).

Almost surely, 2^122771138 is an apocalyptic number.

122771138 is a deficient number, since it is larger than the sum of its proper divisors (92827966).

122771138 is a wasteful number, since it uses less digits than its factorization.

122771138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 213937.

The product of its digits is 4704, while the sum is 32.

The square root of 122771138 is about 11080.2138066014. The cubic root of 122771138 is about 497.0103435374.

The spelling of 122771138 in words is "one hundred twenty-two million, seven hundred seventy-one thousand, one hundred thirty-eight".