121356957 has 8 divisors (see below), whose sum is σ = 161906976. Its totient is φ = 80855792.

The previous prime is 121356953. The next prime is 121356973. The reversal of 121356957 is 759653121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 121356957 - 2² = 121356953 is a prime.

It is a super-2 number, since 2×121356957² = 29455022024599698, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121356953) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5958 + ... + 16679.

It is an arithmetic number, because the mean of its divisors is an integer number (20238372).

Almost surely, 2^121356957 is an apocalyptic number.

It is an amenable number.

121356957 is a deficient number, since it is larger than the sum of its proper divisors (40550019).

121356957 is a wasteful number, since it uses less digits than its factorization.

121356957 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24427.

The product of its digits is 56700, while the sum is 39.

The square root of 121356957 is about 11016.2133693933. The cubic root of 121356957 is about 495.0946416324.

The spelling of 121356957 in words is "one hundred twenty-one million, three hundred fifty-six thousand, nine hundred fifty-seven".