121390171 has 8 divisors (see below), whose sum is σ = 138799584. Its totient is φ = 103997760.

The previous prime is 121390169. The next prime is 121390177. The reversal of 121390171 is 171093121.

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 121390171 - 2¹ = 121390169 is a prime.

It is not an unprimeable number, because it can be changed into a prime (121390177) 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, 21351 + ... + 26431.

It is an arithmetic number, because the mean of its divisors is an integer number (17349948).

Almost surely, 2^121390171 is an apocalyptic number.

121390171 is a deficient number, since it is larger than the sum of its proper divisors (17409413).

121390171 is an equidigital number, since it uses as much as digits as its factorization.

121390171 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8501.

The product of its (nonzero) digits is 378, while the sum is 25.

The square root of 121390171 is about 11017.7207715571. The cubic root of 121390171 is about 495.1398047443.

The spelling of 121390171 in words is "one hundred twenty-one million, three hundred ninety thousand, one hundred seventy-one".