121433857 has 2 divisors, whose sum is σ = 121433858. Its totient is φ = 121433856.

The previous prime is 121433843. The next prime is 121433861. The reversal of 121433857 is 758334121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 119049921 + 2383936 = 10911^2 + 1544^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121433857 is a prime.

It is not a weakly prime, because it can be changed into another prime (121433827) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60716928 + 60716929.

It is an arithmetic number, because the mean of its divisors is an integer number (60716929).

Almost surely, 2^121433857 is an apocalyptic number.

It is an amenable number.

121433857 is a deficient number, since it is larger than the sum of its proper divisors (1).

121433857 is an equidigital number, since it uses as much as digits as its factorization.

121433857 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 20160, while the sum is 34.

The square root of 121433857 is about 11019.7031266727. The cubic root of 121433857 is about 495.1991947345.

Adding to 121433857 its reverse (758334121), we get a palindrome (879767978).

The spelling of 121433857 in words is "one hundred twenty-one million, four hundred thirty-three thousand, eight hundred fifty-seven".