121329979 has 4 divisors (see below), whose sum is σ = 121375584. Its totient is φ = 121284376.

The previous prime is 121329977. The next prime is 121330031. The reversal of 121329979 is 979923121.

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

It is a cyclic number.

It is not a de Polignac number, because 121329979 - 2¹ = 121329977 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121329977) 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, 18547 + ... + 24220.

It is an arithmetic number, because the mean of its divisors is an integer number (30343896).

Almost surely, 2^121329979 is an apocalyptic number.

121329979 is a deficient number, since it is larger than the sum of its proper divisors (45605).

121329979 is an equidigital number, since it uses as much as digits as its factorization.

121329979 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45604.

The product of its digits is 61236, while the sum is 43.

The square root of 121329979 is about 11014.9888334033. The cubic root of 121329979 is about 495.0579519267.

The spelling of 121329979 in words is "one hundred twenty-one million, three hundred twenty-nine thousand, nine hundred seventy-nine".