121155313 has 2 divisors, whose sum is σ = 121155314. Its totient is φ = 121155312.

The previous prime is 121155299. The next prime is 121155317. The reversal of 121155313 is 313551121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 116899344 + 4255969 = 10812^2 + 2063^2 .

It is a cyclic number.

It is not a de Polignac number, because 121155313 - 2¹³ = 121147121 is a prime.

It is not a weakly prime, because it can be changed into another prime (121155317) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60577656 + 60577657.

It is an arithmetic number, because the mean of its divisors is an integer number (60577657).

Almost surely, 2^121155313 is an apocalyptic number.

It is an amenable number.

121155313 is a deficient number, since it is larger than the sum of its proper divisors (1).

121155313 is an equidigital number, since it uses as much as digits as its factorization.

121155313 is an evil number, because the sum of its binary digits is even.

The product of its digits is 450, while the sum is 22.

The square root of 121155313 is about 11007.0574178570. The cubic root of 121155313 is about 494.8202768965.

The spelling of 121155313 in words is "one hundred twenty-one million, one hundred fifty-five thousand, three hundred thirteen".