12197806931 has 2 divisors, whose sum is σ = 12197806932. Its totient is φ = 12197806930.

The previous prime is 12197806927. The next prime is 12197806937. The reversal of 12197806931 is 13960879121.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 12197806931 - 2² = 12197806927 is a prime.

It is a super-2 number, since 2×12197806931² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (12197806937) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6098903465 + 6098903466.

It is an arithmetic number, because the mean of its divisors is an integer number (6098903466).

Almost surely, 2^12197806931 is an apocalyptic number.

12197806931 is a deficient number, since it is larger than the sum of its proper divisors (1).

12197806931 is an equidigital number, since it uses as much as digits as its factorization.

12197806931 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 163296, while the sum is 47.

The spelling of 12197806931 in words is "twelve billion, one hundred ninety-seven million, eight hundred six thousand, nine hundred thirty-one".