121171513 has 2 divisors, whose sum is σ = 121171514. Its totient is φ = 121171512.

The previous prime is 121171489. The next prime is 121171517. The reversal of 121171513 is 315171121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 119421184 + 1750329 = 10928^2 + 1323^2 .

It is an emirp because it is prime and its reverse (315171121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 121171513 - 2²⁵ = 87617081 is a prime.

It is not a weakly prime, because it can be changed into another prime (121171517) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60585756 + 60585757.

It is an arithmetic number, because the mean of its divisors is an integer number (60585757).

Almost surely, 2^121171513 is an apocalyptic number.

It is an amenable number.

121171513 is a deficient number, since it is larger than the sum of its proper divisors (1).

121171513 is an equidigital number, since it uses as much as digits as its factorization.

121171513 is an evil number, because the sum of its binary digits is even.

The product of its digits is 210, while the sum is 22.

The square root of 121171513 is about 11007.7932847597. The cubic root of 121171513 is about 494.8423304932.

The spelling of 121171513 in words is "one hundred twenty-one million, one hundred seventy-one thousand, five hundred thirteen".