1218044011 has 4 divisors (see below), whose sum is σ = 1218963232. Its totient is φ = 1217124792.

The previous prime is 1218043997. The next prime is 1218044027. The reversal of 1218044011 is 1104408121.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1218044011 - 2¹⁵ = 1218011243 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1218044111) 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, 457620 + ... + 460273.

It is an arithmetic number, because the mean of its divisors is an integer number (304740808).

Almost surely, 2^1218044011 is an apocalyptic number.

1218044011 is a deficient number, since it is larger than the sum of its proper divisors (919221).

1218044011 is an equidigital number, since it uses as much as digits as its factorization.

1218044011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 919220.

The product of its (nonzero) digits is 256, while the sum is 22.

The square root of 1218044011 is about 34900.4872602088. The cubic root of 1218044011 is about 1067.9583775926.

The spelling of 1218044011 in words is "one billion, two hundred eighteen million, forty-four thousand, eleven".