121579171 has 4 divisors (see below), whose sum is σ = 138947632. Its totient is φ = 104210712.

The previous prime is 121579169. The next prime is 121579181. The reversal of 121579171 is 171975121.

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 121579171 - 2¹ = 121579169 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121579181) 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, 8684220 + ... + 8684233.

It is an arithmetic number, because the mean of its divisors is an integer number (34736908).

Almost surely, 2^121579171 is an apocalyptic number.

121579171 is a deficient number, since it is larger than the sum of its proper divisors (17368461).

121579171 is an equidigital number, since it uses as much as digits as its factorization.

121579171 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17368460.

The product of its digits is 4410, while the sum is 34.

The square root of 121579171 is about 11026.2945271746. The cubic root of 121579171 is about 495.3966429399.

The spelling of 121579171 in words is "one hundred twenty-one million, five hundred seventy-nine thousand, one hundred seventy-one".