1118218121 has 8 divisors (see below), whose sum is σ = 1134733824. Its totient is φ = 1101723840.

The previous prime is 1118218111. The next prime is 1118218169. The reversal of 1118218121 is 1218128111.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1118218121 - 2¹⁰ = 1118217097 is a prime.

It is a super-2 number, since 2×1118218121² = 2500823532265541282, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1118218111) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 121736 + ... + 130598.

It is an arithmetic number, because the mean of its divisors is an integer number (141841728).

Almost surely, 2^1118218121 is an apocalyptic number.

It is an amenable number.

1118218121 is a deficient number, since it is larger than the sum of its proper divisors (16515703).

1118218121 is an equidigital number, since it uses as much as digits as its factorization.

1118218121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10711.

The product of its digits is 256, while the sum is 26.

The square root of 1118218121 is about 33439.7685548211. The cubic root of 1118218121 is about 1037.9477901750.

The spelling of 1118218121 in words is "one billion, one hundred eighteen million, two hundred eighteen thousand, one hundred twenty-one".