121179913 has 4 divisors (see below), whose sum is σ = 121281028. Its totient is φ = 121078800.

The previous prime is 121179881. The next prime is 121179937. The reversal of 121179913 is 319971121.

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

It can be written as a sum of positive squares in 2 ways, for example, as 62932489 + 58247424 = 7933^2 + 7632^2 .

It is a cyclic number.

It is not a de Polignac number, because 121179913 - 2⁵ = 121179881 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121179943) 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, 48738 + ... + 51163.

It is an arithmetic number, because the mean of its divisors is an integer number (30320257).

Almost surely, 2^121179913 is an apocalyptic number.

It is an amenable number.

121179913 is a deficient number, since it is larger than the sum of its proper divisors (101115).

121179913 is an equidigital number, since it uses as much as digits as its factorization.

121179913 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101114.

The product of its digits is 3402, while the sum is 34.

The square root of 121179913 is about 11008.1748260100. The cubic root of 121179913 is about 494.8537649177.

The spelling of 121179913 in words is "one hundred twenty-one million, one hundred seventy-nine thousand, nine hundred thirteen".