122111491 has 2 divisors, whose sum is σ = 122111492. Its totient is φ = 122111490.

The previous prime is 122111467. The next prime is 122111579. The reversal of 122111491 is 194111221.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 122111491 - 2²³ = 113722883 is a prime.

It is a super-2 number, since 2×122111491² = 29822432468486162, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (122111441) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61055745 + 61055746.

It is an arithmetic number, because the mean of its divisors is an integer number (61055746).

Almost surely, 2^122111491 is an apocalyptic number.

122111491 is a deficient number, since it is larger than the sum of its proper divisors (1).

122111491 is an equidigital number, since it uses as much as digits as its factorization.

122111491 is an evil number, because the sum of its binary digits is even.

The product of its digits is 144, while the sum is 22.

The square root of 122111491 is about 11050.4068250902. The cubic root of 122111491 is about 496.1186021335.

The spelling of 122111491 in words is "one hundred twenty-two million, one hundred eleven thousand, four hundred ninety-one".