118535021 has 4 divisors (see below), whose sum is σ = 129310944. Its totient is φ = 107759100.

The previous prime is 118535009. The next prime is 118535023. The reversal of 118535021 is 120535811.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 120535811 = 11 ⋅10957801.

It is a cyclic number.

It is not a de Polignac number, because 118535021 - 2²⁶ = 51426157 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (118535023) 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, 5387945 + ... + 5387966.

It is an arithmetic number, because the mean of its divisors is an integer number (32327736).

Almost surely, 2^118535021 is an apocalyptic number.

118535021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

118535021 is a deficient number, since it is larger than the sum of its proper divisors (10775923).

118535021 is a wasteful number, since it uses less digits than its factorization.

118535021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10775922.

The product of its (nonzero) digits is 1200, while the sum is 26.

The square root of 118535021 is about 10887.3789775134. The cubic root of 118535021 is about 491.2269971337.

The spelling of 118535021 in words is "one hundred eighteen million, five hundred thirty-five thousand, twenty-one".