121375571 has 4 divisors (see below), whose sum is σ = 125290944. Its totient is φ = 117460200.

The previous prime is 121375559. The next prime is 121375603. The reversal of 121375571 is 175573121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 175573121 = 191 ⋅919231.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121375571 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121375171) 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, 1957640 + ... + 1957701.

It is an arithmetic number, because the mean of its divisors is an integer number (31322736).

Almost surely, 2^121375571 is an apocalyptic number.

121375571 is a deficient number, since it is larger than the sum of its proper divisors (3915373).

121375571 is an equidigital number, since it uses as much as digits as its factorization.

121375571 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3915372.

The product of its digits is 7350, while the sum is 32.

The square root of 121375571 is about 11017.0581826548. The cubic root of 121375571 is about 495.1199532441.

The spelling of 121375571 in words is "one hundred twenty-one million, three hundred seventy-five thousand, five hundred seventy-one".