121291867 has 2 divisors, whose sum is σ = 121291868. Its totient is φ = 121291866.

The previous prime is 121291853. The next prime is 121291879. The reversal of 121291867 is 768192121.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121291867 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (121291847) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60645933 + 60645934.

It is an arithmetic number, because the mean of its divisors is an integer number (60645934).

Almost surely, 2^121291867 is an apocalyptic number.

121291867 is a deficient number, since it is larger than the sum of its proper divisors (1).

121291867 is an equidigital number, since it uses as much as digits as its factorization.

121291867 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 12096, while the sum is 37.

The square root of 121291867 is about 11013.2586912321. The cubic root of 121291867 is about 495.0061108656.

The spelling of 121291867 in words is "one hundred twenty-one million, two hundred ninety-one thousand, eight hundred sixty-seven".