12999917951 has 2 divisors, whose sum is σ = 12999917952. Its totient is φ = 12999917950.

The previous prime is 12999917941. The next prime is 12999917999. The reversal of 12999917951 is 15971999921.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 12999917951 - 2¹⁰ = 12999916927 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12999917941) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6499958975 + 6499958976.

It is an arithmetic number, because the mean of its divisors is an integer number (6499958976).

Almost surely, 2^12999917951 is an apocalyptic number.

12999917951 is a deficient number, since it is larger than the sum of its proper divisors (1).

12999917951 is an equidigital number, since it uses as much as digits as its factorization.

12999917951 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4133430, while the sum is 62.

The spelling of 12999917951 in words is "twelve billion, nine hundred ninety-nine million, nine hundred seventeen thousand, nine hundred fifty-one".