118411021 has 4 divisors (see below), whose sum is σ = 124643200. Its totient is φ = 112178844.

The previous prime is 118411009. The next prime is 118411039. The reversal of 118411021 is 120114811.

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 not a de Polignac number, because 118411021 - 2¹³ = 118402829 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (19), and also a Moran number because the ratio is a prime number: 6232159 = 118411021 / (1 + 1 + 8 + 4 + 1 + 1 + 0 + 2 + 1).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 118411021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (118411081) 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, 3116061 + ... + 3116098.

It is an arithmetic number, because the mean of its divisors is an integer number (31160800).

Almost surely, 2^118411021 is an apocalyptic number.

It is an amenable number.

118411021 is a deficient number, since it is larger than the sum of its proper divisors (6232179).

118411021 is an equidigital number, since it uses as much as digits as its factorization.

118411021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6232178.

The product of its (nonzero) digits is 64, while the sum is 19.

The square root of 118411021 is about 10881.6828202259. The cubic root of 118411021 is about 491.0556458047.

Adding to 118411021 its reverse (120114811), we get a palindrome (238525832).

The spelling of 118411021 in words is "one hundred eighteen million, four hundred eleven thousand, twenty-one".