121351657 has 8 divisors (see below), whose sum is σ = 144717696. Its totient is φ = 99493152.

The previous prime is 121351649. The next prime is 121351667. The reversal of 121351657 is 756153121.

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 121351657 - 2³ = 121351649 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121351667) 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, 376708 + ... + 377029.

It is an arithmetic number, because the mean of its divisors is an integer number (18089712).

Almost surely, 2^121351657 is an apocalyptic number.

It is an amenable number.

121351657 is a deficient number, since it is larger than the sum of its proper divisors (23366039).

121351657 is an equidigital number, since it uses as much as digits as its factorization.

121351657 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 753767.

The product of its digits is 6300, while the sum is 31.

The square root of 121351657 is about 11015.9728122395. The cubic root of 121351657 is about 495.0874341352.

The spelling of 121351657 in words is "one hundred twenty-one million, three hundred fifty-one thousand, six hundred fifty-seven".