15008121281 has 2 divisors, whose sum is σ = 15008121282. Its totient is φ = 15008121280.

The previous prime is 15008121269. The next prime is 15008121313. The reversal of 15008121281 is 18212180051.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 14713690000 + 294431281 = 121300^2 + 17159^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-15008121281 is a prime.

It is a super-2 number, since 2×15008121281² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (15008121221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7504060640 + 7504060641.

It is an arithmetic number, because the mean of its divisors is an integer number (7504060641).

Almost surely, 2^15008121281 is an apocalyptic number.

It is an amenable number.

15008121281 is a deficient number, since it is larger than the sum of its proper divisors (1).

15008121281 is an equidigital number, since it uses as much as digits as its factorization.

15008121281 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1280, while the sum is 29.

The spelling of 15008121281 in words is "fifteen billion, eight million, one hundred twenty-one thousand, two hundred eighty-one".