15155055121 has 2 divisors, whose sum is σ = 15155055122. Its totient is φ = 15155055120.

The previous prime is 15155055089. The next prime is 15155055137. The reversal of 15155055121 is 12155055151.

It is a happy number.

15155055121 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12114084096 + 3040971025 = 110064^2 + 55145^2 .

It is a cyclic number.

It is not a de Polignac number, because 15155055121 - 2⁵ = 15155055089 is a prime.

It is not a weakly prime, because it can be changed into another prime (15155055221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7577527560 + 7577527561.

It is an arithmetic number, because the mean of its divisors is an integer number (7577527561).

Almost surely, 2^15155055121 is an apocalyptic number.

It is an amenable number.

15155055121 is a deficient number, since it is larger than the sum of its proper divisors (1).

15155055121 is an equidigital number, since it uses as much as digits as its factorization.

15155055121 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6250, while the sum is 31.

The spelling of 15155055121 in words is "fifteen billion, one hundred fifty-five million, fifty-five thousand, one hundred twenty-one".