121912079 has 2 divisors, whose sum is σ = 121912080. Its totient is φ = 121912078.

The previous prime is 121912073. The next prime is 121912081. The reversal of 121912079 is 970219121.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121912079 is a prime.

It is a super-2 number, since 2×121912079² = 29725110012204482, which contains 22 as substring.

It is a Sophie Germain prime.

Together with 121912081, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121912073) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60956039 + 60956040.

It is an arithmetic number, because the mean of its divisors is an integer number (60956040).

Almost surely, 2^121912079 is an apocalyptic number.

121912079 is a deficient number, since it is larger than the sum of its proper divisors (1).

121912079 is an equidigital number, since it uses as much as digits as its factorization.

121912079 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2268, while the sum is 32.

The square root of 121912079 is about 11041.3803032048. The cubic root of 121912079 is about 495.8483957731.

The spelling of 121912079 in words is "one hundred twenty-one million, nine hundred twelve thousand, seventy-nine".