121202879 has 4 divisors (see below), whose sum is σ = 138517584. Its totient is φ = 103888176.

The previous prime is 121202833. The next prime is 121202899. The reversal of 121202879 is 978202121.

It is a happy number.

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

It is not a de Polignac number, because 121202879 - 2⁸ = 121202623 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 (121202899) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8657342 + ... + 8657355.

It is an arithmetic number, because the mean of its divisors is an integer number (34629396).

Almost surely, 2^121202879 is an apocalyptic number.

121202879 is a deficient number, since it is larger than the sum of its proper divisors (17314705).

121202879 is an equidigital number, since it uses as much as digits as its factorization.

121202879 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17314704.

The product of its (nonzero) digits is 4032, while the sum is 32.

The square root of 121202879 is about 11009.2179104603. The cubic root of 121202879 is about 494.8850244815.

The spelling of 121202879 in words is "one hundred twenty-one million, two hundred two thousand, eight hundred seventy-nine".