12108931 has 2 divisors, whose sum is σ = 12108932. Its totient is φ = 12108930.

The previous prime is 12108917. The next prime is 12108949. The reversal of 12108931 is 13980121.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 12108931 - 2¹⁷ = 11977859 is a prime.

It is a super-2 number, since 2×12108931² = 293252419925522, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 12108896 and 12108905.

It is not a weakly prime, because it can be changed into another prime (12108911) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6054465 + 6054466.

It is an arithmetic number, because the mean of its divisors is an integer number (6054466).

Almost surely, 2^12108931 is an apocalyptic number.

12108931 is a deficient number, since it is larger than the sum of its proper divisors (1).

12108931 is an equidigital number, since it uses as much as digits as its factorization.

12108931 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 432, while the sum is 25.

The square root of 12108931 is about 3479.7889303807. The cubic root of 12108931 is about 229.6335121172.

The spelling of 12108931 in words is "twelve million, one hundred eight thousand, nine hundred thirty-one".