31111151129 has 2 divisors, whose sum is σ = 31111151130. Its totient is φ = 31111151128.

The previous prime is 31111151119. The next prime is 31111151167. The reversal of 31111151129 is 92115111113.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 30179680729 + 931470400 = 173723^2 + 30520^2 .

It is a cyclic number.

It is not a de Polignac number, because 31111151129 - 2³² = 26816183833 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 31111151098 and 31111151107.

It is not a weakly prime, because it can be changed into another prime (31111151119) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15555575564 + 15555575565.

It is an arithmetic number, because the mean of its divisors is an integer number (15555575565).

Almost surely, 2^31111151129 is an apocalyptic number.

It is an amenable number.

31111151129 is a deficient number, since it is larger than the sum of its proper divisors (1).

31111151129 is an equidigital number, since it uses as much as digits as its factorization.

31111151129 is an evil number, because the sum of its binary digits is even.

The product of its digits is 270, while the sum is 26.

The spelling of 31111151129 in words is "thirty-one billion, one hundred eleven million, one hundred fifty-one thousand, one hundred twenty-nine".