121620359 has 4 divisors (see below), whose sum is σ = 138994704. Its totient is φ = 104246016.

The previous prime is 121620353. The next prime is 121620371. The reversal of 121620359 is 953026121.

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

It is not a de Polignac number, because 121620359 - 2²⁰ = 120571783 is a prime.

It is a Duffinian number.

It is a zygodrome in base 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121620353) 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, 8687162 + ... + 8687175.

It is an arithmetic number, because the mean of its divisors is an integer number (34748676).

Almost surely, 2^121620359 is an apocalyptic number.

121620359 is a deficient number, since it is larger than the sum of its proper divisors (17374345).

121620359 is an equidigital number, since it uses as much as digits as its factorization.

121620359 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17374344.

The product of its (nonzero) digits is 3240, while the sum is 29.

The square root of 121620359 is about 11028.1620862227. The cubic root of 121620359 is about 495.4525793119.

The spelling of 121620359 in words is "one hundred twenty-one million, six hundred twenty thousand, three hundred fifty-nine".