121207679 has 4 divisors (see below), whose sum is σ = 121278576. Its totient is φ = 121136784.

The previous prime is 121207643. The next prime is 121207693. The reversal of 121207679 is 976702121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 976702121 = 173 ⋅5645677.

It is a cyclic number.

It is not a de Polignac number, because 121207679 - 2⁸ = 121207423 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121207609) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32819 + ... + 36324.

It is an arithmetic number, because the mean of its divisors is an integer number (30319644).

Almost surely, 2^121207679 is an apocalyptic number.

121207679 is a deficient number, since it is larger than the sum of its proper divisors (70897).

121207679 is an equidigital number, since it uses as much as digits as its factorization.

121207679 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70896.

The product of its (nonzero) digits is 10584, while the sum is 35.

The square root of 121207679 is about 11009.4359074387. The cubic root of 121207679 is about 494.8915573757.

The spelling of 121207679 in words is "one hundred twenty-one million, two hundred seven thousand, six hundred seventy-nine".