15120101281 has 2 divisors, whose sum is σ = 15120101282. Its totient is φ = 15120101280.

The previous prime is 15120101239. The next prime is 15120101299. The reversal of 15120101281 is 18210102151.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13290400656 + 1829700625 = 115284^2 + 42775^2 .

It is a cyclic number.

It is not a de Polignac number, because 15120101281 - 2²⁷ = 14985883553 is a prime.

It is a super-2 number, since 2×15120101281² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (15120101221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7560050640 + 7560050641.

It is an arithmetic number, because the mean of its divisors is an integer number (7560050641).

Almost surely, 2^15120101281 is an apocalyptic number.

It is an amenable number.

15120101281 is a deficient number, since it is larger than the sum of its proper divisors (1).

15120101281 is an equidigital number, since it uses as much as digits as its factorization.

15120101281 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 160, while the sum is 22.

The spelling of 15120101281 in words is "fifteen billion, one hundred twenty million, one hundred one thousand, two hundred eighty-one".