31030112313209 has 2 divisors, whose sum is σ = 31030112313210. Its totient is φ = 31030112313208.

The previous prime is 31030112313163. The next prime is 31030112313229. The reversal of 31030112313209 is 90231321103013.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 31000708637584 + 29403675625 = 5567828^2 + 171475^2 .

It is a cyclic number.

It is not a de Polignac number, because 31030112313209 - 2¹² = 31030112309113 is a prime.

It is not a weakly prime, because it can be changed into another prime (31030112313229) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15515056156604 + 15515056156605.

It is an arithmetic number, because the mean of its divisors is an integer number (15515056156605).

Almost surely, 2^{31030112313209} is an apocalyptic number.

It is an amenable number.

31030112313209 is a deficient number, since it is larger than the sum of its proper divisors (1).

31030112313209 is an equidigital number, since it uses as much as digits as its factorization.

31030112313209 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2916, while the sum is 29.

The spelling of 31030112313209 in words is "thirty-one trillion, thirty billion, one hundred twelve million, three hundred thirteen thousand, two hundred nine".