121997357 has 2 divisors, whose sum is σ = 121997358. Its totient is φ = 121997356.

The previous prime is 121997353. The next prime is 121997371. The reversal of 121997357 is 753799121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 116014441 + 5982916 = 10771^2 + 2446^2 .

It is a cyclic number.

It is not a de Polignac number, because 121997357 - 2² = 121997353 is a prime.

It is a super-2 number, since 2×121997357² = 29766710229970898, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121997353) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60998678 + 60998679.

It is an arithmetic number, because the mean of its divisors is an integer number (60998679).

Almost surely, 2^121997357 is an apocalyptic number.

It is an amenable number.

121997357 is a deficient number, since it is larger than the sum of its proper divisors (1).

121997357 is an equidigital number, since it uses as much as digits as its factorization.

121997357 is an evil number, because the sum of its binary digits is even.

The product of its digits is 119070, while the sum is 44.

The square root of 121997357 is about 11045.2413735509. The cubic root of 121997357 is about 495.9639848221.

The spelling of 121997357 in words is "one hundred twenty-one million, nine hundred ninety-seven thousand, three hundred fifty-seven".