121416857 has 2 divisors, whose sum is σ = 121416858. Its totient is φ = 121416856.

The previous prime is 121416833. The next prime is 121416871. The reversal of 121416857 is 758614121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 101022601 + 20394256 = 10051^2 + 4516^2 .

It is a cyclic number.

It is not a de Polignac number, because 121416857 - 2¹² = 121412761 is a prime.

It is not a weakly prime, because it can be changed into another prime (121416817) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60708428 + 60708429.

It is an arithmetic number, because the mean of its divisors is an integer number (60708429).

Almost surely, 2^121416857 is an apocalyptic number.

It is an amenable number.

121416857 is a deficient number, since it is larger than the sum of its proper divisors (1).

121416857 is an equidigital number, since it uses as much as digits as its factorization.

121416857 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 13440, while the sum is 35.

The square root of 121416857 is about 11018.9317540313. The cubic root of 121416857 is about 495.1760853662.

The spelling of 121416857 in words is "one hundred twenty-one million, four hundred sixteen thousand, eight hundred fifty-seven".