121372313 has 2 divisors, whose sum is σ = 121372314. Its totient is φ = 121372312.

The previous prime is 121372301. The next prime is 121372319. The reversal of 121372313 is 313273121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 121176064 + 196249 = 11008^2 + 443^2 .

It is a cyclic number.

It is not a de Polignac number, because 121372313 - 2⁴ = 121372297 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (121372319) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60686156 + 60686157.

It is an arithmetic number, because the mean of its divisors is an integer number (60686157).

Almost surely, 2^121372313 is an apocalyptic number.

It is an amenable number.

121372313 is a deficient number, since it is larger than the sum of its proper divisors (1).

121372313 is an equidigital number, since it uses as much as digits as its factorization.

121372313 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 756, while the sum is 23.

The square root of 121372313 is about 11016.9103200489. The cubic root of 121372313 is about 495.1155231510.

The spelling of 121372313 in words is "one hundred twenty-one million, three hundred seventy-two thousand, three hundred thirteen".