15714867121 has 2 divisors, whose sum is σ = 15714867122. Its totient is φ = 15714867120.

The previous prime is 15714867109. The next prime is 15714867193. The reversal of 15714867121 is 12176841751.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12832358400 + 2882508721 = 113280^2 + 53689^2 .

It is an emirp because it is prime and its reverse (12176841751) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 15714867121 - 2⁵ = 15714867089 is a prime.

It is not a weakly prime, because it can be changed into another prime (15714867221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7857433560 + 7857433561.

It is an arithmetic number, because the mean of its divisors is an integer number (7857433561).

Almost surely, 2^15714867121 is an apocalyptic number.

It is an amenable number.

15714867121 is a deficient number, since it is larger than the sum of its proper divisors (1).

15714867121 is an equidigital number, since it uses as much as digits as its factorization.

15714867121 is an evil number, because the sum of its binary digits is even.

The product of its digits is 94080, while the sum is 43.

The spelling of 15714867121 in words is "fifteen billion, seven hundred fourteen million, eight hundred sixty-seven thousand, one hundred twenty-one".