122155129 has 2 divisors, whose sum is σ = 122155130. Its totient is φ = 122155128.

The previous prime is 122155109. The next prime is 122155141. The reversal of 122155129 is 921551221.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 121881600 + 273529 = 11040^2 + 523^2 .

It is a cyclic number.

It is not a de Polignac number, because 122155129 - 2¹¹ = 122153081 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 122155097 and 122155106.

It is not a weakly prime, because it can be changed into another prime (122155109) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61077564 + 61077565.

It is an arithmetic number, because the mean of its divisors is an integer number (61077565).

Almost surely, 2^122155129 is an apocalyptic number.

It is an amenable number.

122155129 is a deficient number, since it is larger than the sum of its proper divisors (1).

122155129 is an equidigital number, since it uses as much as digits as its factorization.

122155129 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1800, while the sum is 28.

The square root of 122155129 is about 11052.3811461603. The cubic root of 122155129 is about 496.1776930647.

The spelling of 122155129 in words is "one hundred twenty-two million, one hundred fifty-five thousand, one hundred twenty-nine".