31031776360121 has 2 divisors, whose sum is σ = 31031776360122. Its totient is φ = 31031776360120.

The previous prime is 31031776360061. The next prime is 31031776360133. The reversal of 31031776360121 is 12106367713013.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19266437316025 + 11765339044096 = 4389355^2 + 3430064^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31031776360121 is a prime.

It is a super-2 number, since 2×31031776360121² (a number of 28 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (31031776360181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15515888180060 + 15515888180061.

It is an arithmetic number, because the mean of its divisors is an integer number (15515888180061).

Almost surely, 2^{31031776360121} is an apocalyptic number.

It is an amenable number.

31031776360121 is a deficient number, since it is larger than the sum of its proper divisors (1).

31031776360121 is an equidigital number, since it uses as much as digits as its factorization.

31031776360121 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 95256, while the sum is 41.

The spelling of 31031776360121 in words is "thirty-one trillion, thirty-one billion, seven hundred seventy-six million, three hundred sixty thousand, one hundred twenty-one".