121313929 has 8 divisors (see below), whose sum is σ = 132687360. Its totient is φ = 109998000.

The previous prime is 121313903. The next prime is 121313981. The reversal of 121313929 is 929313121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 121313929 - 2⁵ = 121313897 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 121313929.

It is not an unprimeable number, because it can be changed into a prime (121313999) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9897 + ... + 18454.

It is an arithmetic number, because the mean of its divisors is an integer number (16585920).

Almost surely, 2^121313929 is an apocalyptic number.

It is an amenable number.

121313929 is a deficient number, since it is larger than the sum of its proper divisors (11373431).

121313929 is a wasteful number, since it uses less digits than its factorization.

121313929 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28751.

The product of its digits is 2916, while the sum is 31.

The square root of 121313929 is about 11014.2602565946. The cubic root of 121313929 is about 495.0361215691.

The spelling of 121313929 in words is "one hundred twenty-one million, three hundred thirteen thousand, nine hundred twenty-nine".