12139992971 has 2 divisors, whose sum is σ = 12139992972. Its totient is φ = 12139992970.

The previous prime is 12139992959. The next prime is 12139992973. The reversal of 12139992971 is 17929993121.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12139992971 is a prime.

Together with 12139992973, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (12139992973) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6069996485 + 6069996486.

It is an arithmetic number, because the mean of its divisors is an integer number (6069996486).

Almost surely, 2^12139992971 is an apocalyptic number.

12139992971 is a deficient number, since it is larger than the sum of its proper divisors (1).

12139992971 is an equidigital number, since it uses as much as digits as its factorization.

12139992971 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 551124, while the sum is 53.

The spelling of 12139992971 in words is "twelve billion, one hundred thirty-nine million, nine hundred ninety-two thousand, nine hundred seventy-one".