12157291499 has 2 divisors, whose sum is σ = 12157291500. Its totient is φ = 12157291498.

The previous prime is 12157291469. The next prime is 12157291501. The reversal of 12157291499 is 99419275121.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12157291499 is a prime.

Together with 12157291501, 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 (12157291429) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6078645749 + 6078645750.

It is an arithmetic number, because the mean of its divisors is an integer number (6078645750).

Almost surely, 2^12157291499 is an apocalyptic number.

12157291499 is a deficient number, since it is larger than the sum of its proper divisors (1).

12157291499 is an equidigital number, since it uses as much as digits as its factorization.

12157291499 is an evil number, because the sum of its binary digits is even.

The product of its digits is 408240, while the sum is 50.

The spelling of 12157291499 in words is "twelve billion, one hundred fifty-seven million, two hundred ninety-one thousand, four hundred ninety-nine".