118111521 has 16 divisors (see below), whose sum is σ = 173504448. Its totient is φ = 70872000.

The previous prime is 118111501. The next prime is 118111537. The reversal of 118111521 is 125111811.

It is not a de Polignac number, because 118111521 - 2⁹ = 118111009 is a prime.

It is not an unprimeable number, because it can be changed into a prime (118111501) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14386 + ... + 21051.

It is an arithmetic number, because the mean of its divisors is an integer number (10844028).

Almost surely, 2^118111521 is an apocalyptic number.

118111521 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

118111521 is a deficient number, since it is larger than the sum of its proper divisors (55392927).

118111521 is a wasteful number, since it uses less digits than its factorization.

118111521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35552.

The product of its digits is 80, while the sum is 21.

The square root of 118111521 is about 10867.9124490401. The cubic root of 118111521 is about 490.6412830870.

The spelling of 118111521 in words is "one hundred eighteen million, one hundred eleven thousand, five hundred twenty-one".