122122181 has 2 divisors, whose sum is σ = 122122182. Its totient is φ = 122122180.

The previous prime is 122122129. The next prime is 122122241. The reversal of 122122181 is 181221221.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 119028100 + 3094081 = 10910^2 + 1759^2 .

It is a cyclic number.

It is not a de Polignac number, because 122122181 - 2²⁶ = 55013317 is a prime.

It is a super-2 number, since 2×122122181² = 29827654184393522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (122122081) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61061090 + 61061091.

It is an arithmetic number, because the mean of its divisors is an integer number (61061091).

Almost surely, 2^122122181 is an apocalyptic number.

It is an amenable number.

122122181 is a deficient number, since it is larger than the sum of its proper divisors (1).

122122181 is an equidigital number, since it uses as much as digits as its factorization.

122122181 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 128, while the sum is 20.

The square root of 122122181 is about 11050.8905071039. The cubic root of 122122181 is about 496.1330789395.

The spelling of 122122181 in words is "one hundred twenty-two million, one hundred twenty-two thousand, one hundred eighty-one".