15116209021 has 2 divisors, whose sum is σ = 15116209022. Its totient is φ = 15116209020.

The previous prime is 15116209013. The next prime is 15116209037. The reversal of 15116209021 is 12090261151.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9322868025 + 5793340996 = 96555^2 + 76114^2 .

It is a cyclic number.

It is not a de Polignac number, because 15116209021 - 2³ = 15116209013 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (15116209051) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7558104510 + 7558104511.

It is an arithmetic number, because the mean of its divisors is an integer number (7558104511).

Almost surely, 2^15116209021 is an apocalyptic number.

It is an amenable number.

15116209021 is a deficient number, since it is larger than the sum of its proper divisors (1).

15116209021 is an equidigital number, since it uses as much as digits as its factorization.

15116209021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1080, while the sum is 28.

The spelling of 15116209021 in words is "fifteen billion, one hundred sixteen million, two hundred nine thousand, twenty-one".