131122129 has 2 divisors, whose sum is σ = 131122130. Its totient is φ = 131122128.

The previous prime is 131122111. The next prime is 131122133. The reversal of 131122129 is 921221131.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 120494529 + 10627600 = 10977^2 + 3260^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-131122129 is a prime.

It is not a weakly prime, because it can be changed into another prime (131122109) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65561064 + 65561065.

It is an arithmetic number, because the mean of its divisors is an integer number (65561065).

Almost surely, 2^131122129 is an apocalyptic number.

It is an amenable number.

131122129 is a deficient number, since it is larger than the sum of its proper divisors (1).

131122129 is an equidigital number, since it uses as much as digits as its factorization.

131122129 is an evil number, because the sum of its binary digits is even.

The product of its digits is 216, while the sum is 22.

The square root of 131122129 is about 11450.8571294904. The cubic root of 131122129 is about 508.0330865362.

The spelling of 131122129 in words is "one hundred thirty-one million, one hundred twenty-two thousand, one hundred twenty-nine".