12190809731 has 2 divisors, whose sum is σ = 12190809732. Its totient is φ = 12190809730.

The previous prime is 12190809727. The next prime is 12190809749. The reversal of 12190809731 is 13790809121.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 12190809731 - 2² = 12190809727 is a prime.

It is a super-2 number, since 2×12190809731² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (12190809791) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6095404865 + 6095404866.

It is an arithmetic number, because the mean of its divisors is an integer number (6095404866).

Almost surely, 2^12190809731 is an apocalyptic number.

12190809731 is a deficient number, since it is larger than the sum of its proper divisors (1).

12190809731 is an equidigital number, since it uses as much as digits as its factorization.

12190809731 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 27216, while the sum is 41.

The spelling of 12190809731 in words is "twelve billion, one hundred ninety million, eight hundred nine thousand, seven hundred thirty-one".