122312091 has 16 divisors (see below), whose sum is σ = 185644800. Its totient is φ = 70905120.

The previous prime is 122312089. The next prime is 122312123. The reversal of 122312091 is 190213221.

It is not a de Polignac number, because 122312091 - 2¹ = 122312089 is a prime.

It is not an unprimeable number, because it can be changed into a prime (122312591) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 79816 + ... + 81333.

It is an arithmetic number, because the mean of its divisors is an integer number (11602800).

Almost surely, 2^122312091 is an apocalyptic number.

122312091 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

122312091 is a deficient number, since it is larger than the sum of its proper divisors (63332709).

122312091 is a wasteful number, since it uses less digits than its factorization.

122312091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 161186.

The product of its (nonzero) digits is 216, while the sum is 21.

The square root of 122312091 is about 11059.4796893886. The cubic root of 122312091 is about 496.3901216109.

It can be divided in two parts, 122 and 312091, that added together give a palindrome (312213).

The spelling of 122312091 in words is "one hundred twenty-two million, three hundred twelve thousand, ninety-one".