116121571 has 4 divisors (see below), whose sum is σ = 116143144. Its totient is φ = 116100000.

The previous prime is 116121563. The next prime is 116121581. The reversal of 116121571 is 175121611.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 175121611 = 7 ⋅25017373.

It is a cyclic number.

It is not a de Polignac number, because 116121571 - 2³ = 116121563 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (116121581) 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, 4696 + ... + 15946.

It is an arithmetic number, because the mean of its divisors is an integer number (29035786).

Almost surely, 2^116121571 is an apocalyptic number.

116121571 is a deficient number, since it is larger than the sum of its proper divisors (21573).

116121571 is a wasteful number, since it uses less digits than its factorization.

116121571 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21572.

The product of its digits is 420, while the sum is 25.

The square root of 116121571 is about 10775.9719283228. The cubic root of 116121571 is about 487.8702106578.

The spelling of 116121571 in words is "one hundred sixteen million, one hundred twenty-one thousand, five hundred seventy-one".