121399357 has 2 divisors, whose sum is σ = 121399358. Its totient is φ = 121399356.

The previous prime is 121399321. The next prime is 121399367. The reversal of 121399357 is 753993121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 64336441 + 57062916 = 8021^2 + 7554^2 .

It is a cyclic number.

It is not a de Polignac number, because 121399357 - 2²³ = 113010749 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121399367) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60699678 + 60699679.

It is an arithmetic number, because the mean of its divisors is an integer number (60699679).

Almost surely, 2^121399357 is an apocalyptic number.

It is an amenable number.

121399357 is a deficient number, since it is larger than the sum of its proper divisors (1).

121399357 is an equidigital number, since it uses as much as digits as its factorization.

121399357 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 51030, while the sum is 40.

The square root of 121399357 is about 11018.1376375502. The cubic root of 121399357 is about 495.1522940573.

The spelling of 121399357 in words is "one hundred twenty-one million, three hundred ninety-nine thousand, three hundred fifty-seven".