118213013 has 4 divisors (see below), whose sum is σ = 122026368. Its totient is φ = 114399660.

The previous prime is 118212989. The next prime is 118213021. The reversal of 118213013 is 310312811.

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: 310312811 = 43 ⋅7216577.

It is a cyclic number.

It is not a de Polignac number, because 118213013 - 2¹² = 118208917 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 (118213213) 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, 1906631 + ... + 1906692.

It is an arithmetic number, because the mean of its divisors is an integer number (30506592).

Almost surely, 2^118213013 is an apocalyptic number.

It is an amenable number.

118213013 is a deficient number, since it is larger than the sum of its proper divisors (3813355).

118213013 is an equidigital number, since it uses as much as digits as its factorization.

118213013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3813354.

The product of its (nonzero) digits is 144, while the sum is 20.

The square root of 118213013 is about 10872.5807883869. The cubic root of 118213013 is about 490.7817771681.

Adding to 118213013 its reverse (310312811), we get a palindrome (428525824).

The spelling of 118213013 in words is "one hundred eighteen million, two hundred thirteen thousand, thirteen".