121237686857 has 8 divisors (see below), whose sum is σ = 138743846016. Its totient is φ = 103778150112.

The previous prime is 121237686841. The next prime is 121237686859. The reversal of 121237686857 is 758686732121.

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

It is not a de Polignac number, because 121237686857 - 2⁴ = 121237686841 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121237686859) 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, 11650028 + ... + 11660429.

It is an arithmetic number, because the mean of its divisors is an integer number (17342980752).

Almost surely, 2^121237686857 is an apocalyptic number.

It is an amenable number.

121237686857 is a deficient number, since it is larger than the sum of its proper divisors (17506159159).

121237686857 is an equidigital number, since it uses as much as digits as its factorization.

121237686857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23311207.

The product of its digits is 6773760, while the sum is 56.

The spelling of 121237686857 in words is "one hundred twenty-one billion, two hundred thirty-seven million, six hundred eighty-six thousand, eight hundred fifty-seven".