118100081 has 4 divisors (see below), whose sum is σ = 128836464. Its totient is φ = 107363700.

The previous prime is 118100069. The next prime is 118100107. The reversal of 118100081 is 180001811.

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.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-118100081 is a prime.

It is a super-2 number, since 2×118100081² = 27895258264413122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (118100681) 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, 5368175 + ... + 5368196.

It is an arithmetic number, because the mean of its divisors is an integer number (32209116).

Almost surely, 2^118100081 is an apocalyptic number.

118100081 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

118100081 is a deficient number, since it is larger than the sum of its proper divisors (10736383).

118100081 is a wasteful number, since it uses less digits than its factorization.

118100081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10736382.

The product of its (nonzero) digits is 64, while the sum is 20.

The square root of 118100081 is about 10867.3861162655. The cubic root of 118100081 is about 490.6254417944.

Adding to 118100081 its reverse (180001811), we get a palindrome (298101892).

The spelling of 118100081 in words is "one hundred eighteen million, one hundred thousand, eighty-one".