15101922721 has 2 divisors, whose sum is σ = 15101922722. Its totient is φ = 15101922720.

The previous prime is 15101922691. The next prime is 15101922793. The reversal of 15101922721 is 12722910151.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12211355025 + 2890567696 = 110505^2 + 53764^2 .

It is a cyclic number.

It is not a de Polignac number, because 15101922721 - 2⁷ = 15101922593 is a prime.

It is not a weakly prime, because it can be changed into another prime (15101932721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7550961360 + 7550961361.

It is an arithmetic number, because the mean of its divisors is an integer number (7550961361).

Almost surely, 2^15101922721 is an apocalyptic number.

It is an amenable number.

15101922721 is a deficient number, since it is larger than the sum of its proper divisors (1).

15101922721 is an equidigital number, since it uses as much as digits as its factorization.

15101922721 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2520, while the sum is 31.

The spelling of 15101922721 in words is "fifteen billion, one hundred one million, nine hundred twenty-two thousand, seven hundred twenty-one".