121298979 has 4 divisors (see below), whose sum is σ = 161731976. Its totient is φ = 80865984.

The previous prime is 121298971. The next prime is 121298981. The reversal of 121298979 is 979892121.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 121298979 - 2³ = 121298971 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121298971) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20216494 + ... + 20216499.

It is an arithmetic number, because the mean of its divisors is an integer number (40432994).

Almost surely, 2^121298979 is an apocalyptic number.

121298979 is a deficient number, since it is larger than the sum of its proper divisors (40432997).

121298979 is an equidigital number, since it uses as much as digits as its factorization.

121298979 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40432996.

The product of its digits is 163296, while the sum is 48.

The square root of 121298979 is about 11013.5815700434. The cubic root of 121298979 is about 495.0157856409.

The spelling of 121298979 in words is "one hundred twenty-one million, two hundred ninety-eight thousand, nine hundred seventy-nine".