121197571 has 4 divisors (see below), whose sum is σ = 132215544. Its totient is φ = 110179600.

The previous prime is 121197547. The next prime is 121197577. The reversal of 121197571 is 175791121.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121197571 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121197577) 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, 5508970 + ... + 5508991.

It is an arithmetic number, because the mean of its divisors is an integer number (33053886).

Almost surely, 2^121197571 is an apocalyptic number.

121197571 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

121197571 is a deficient number, since it is larger than the sum of its proper divisors (11017973).

121197571 is a wasteful number, since it uses less digits than its factorization.

121197571 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11017972.

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

The square root of 121197571 is about 11008.9768371089. The cubic root of 121197571 is about 494.8777999885.

The spelling of 121197571 in words is "one hundred twenty-one million, one hundred ninety-seven thousand, five hundred seventy-one".