131111201221129 has 2 divisors, whose sum is σ = 131111201221130. Its totient is φ = 131111201221128.

The previous prime is 131111201221081. The next prime is 131111201221139. The reversal of 131111201221129 is 921122102111131.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 126155577610000 + 4955623611129 = 11231900^2 + 2226123^2 .

It is a cyclic number.

It is not a de Polignac number, because 131111201221129 - 2²⁵ = 131111167666697 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 131111201221097 and 131111201221106.

It is not a weakly prime, because it can be changed into another prime (131111201221139) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65555600610564 + 65555600610565.

It is an arithmetic number, because the mean of its divisors is an integer number (65555600610565).

Almost surely, 2^{131111201221129} is an apocalyptic number.

It is an amenable number.

131111201221129 is a deficient number, since it is larger than the sum of its proper divisors (1).

131111201221129 is an equidigital number, since it uses as much as digits as its factorization.

131111201221129 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 432, while the sum is 28.

The spelling of 131111201221129 in words is "one hundred thirty-one trillion, one hundred eleven billion, two hundred one million, two hundred twenty-one thousand, one hundred twenty-nine".