31102012169 has 2 divisors, whose sum is σ = 31102012170. Its totient is φ = 31102012168.

The previous prime is 31102012127. The next prime is 31102012181. The reversal of 31102012169 is 96121020113.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 24748009225 + 6354002944 = 157315^2 + 79712^2 .

It is an emirp because it is prime and its reverse (96121020113) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31102012169 is a prime.

It is a super-2 number, since 2×31102012169² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (31102012369) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15551006084 + 15551006085.

It is an arithmetic number, because the mean of its divisors is an integer number (15551006085).

Almost surely, 2^31102012169 is an apocalyptic number.

It is an amenable number.

31102012169 is a deficient number, since it is larger than the sum of its proper divisors (1).

31102012169 is an equidigital number, since it uses as much as digits as its factorization.

31102012169 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 648, while the sum is 26.

The spelling of 31102012169 in words is "thirty-one billion, one hundred two million, twelve thousand, one hundred sixty-nine".