121915357 has 2 divisors, whose sum is σ = 121915358. Its totient is φ = 121915356.

The previous prime is 121915351. The next prime is 121915369. The reversal of 121915357 is 753519121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 120362841 + 1552516 = 10971^2 + 1246^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121915357 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121915351) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60957678 + 60957679.

It is an arithmetic number, because the mean of its divisors is an integer number (60957679).

Almost surely, 2^121915357 is an apocalyptic number.

It is an amenable number.

121915357 is a deficient number, since it is larger than the sum of its proper divisors (1).

121915357 is an equidigital number, since it uses as much as digits as its factorization.

121915357 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9450, while the sum is 34.

The square root of 121915357 is about 11041.5287437927. The cubic root of 121915357 is about 495.8528398951.

The spelling of 121915357 in words is "one hundred twenty-one million, nine hundred fifteen thousand, three hundred fifty-seven".