121669313 has 2 divisors, whose sum is σ = 121669314. Its totient is φ = 121669312.

The previous prime is 121669279. The next prime is 121669321. The reversal of 121669313 is 313966121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 74787904 + 46881409 = 8648^2 + 6847^2 .

It is a cyclic number.

It is not a de Polignac number, because 121669313 - 2²⁰ = 120620737 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 121669313.

It is not a weakly prime, because it can be changed into another prime (121669813) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60834656 + 60834657.

It is an arithmetic number, because the mean of its divisors is an integer number (60834657).

Almost surely, 2^121669313 is an apocalyptic number.

It is an amenable number.

121669313 is a deficient number, since it is larger than the sum of its proper divisors (1).

121669313 is an equidigital number, since it uses as much as digits as its factorization.

121669313 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5832, while the sum is 32.

The square root of 121669313 is about 11030.3813624008. The cubic root of 121669313 is about 495.5190460675.

The spelling of 121669313 in words is "one hundred twenty-one million, six hundred sixty-nine thousand, three hundred thirteen".