1118131211 has 2 divisors, whose sum is σ = 1118131212. Its totient is φ = 1118131210.

The previous prime is 1118131207. The next prime is 1118131237. The reversal of 1118131211 is 1121318111.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1118131211 - 2² = 1118131207 is a prime.

It is not a weakly prime, because it can be changed into another prime (1118131111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 559065605 + 559065606.

It is an arithmetic number, because the mean of its divisors is an integer number (559065606).

Almost surely, 2^1118131211 is an apocalyptic number.

1118131211 is a deficient number, since it is larger than the sum of its proper divisors (1).

1118131211 is an equidigital number, since it uses as much as digits as its factorization.

1118131211 is an evil number, because the sum of its binary digits is even.

The product of its digits is 48, while the sum is 20.

The square root of 1118131211 is about 33438.4690289493. The cubic root of 1118131211 is about 1037.9208990649.

Adding to 1118131211 its reverse (1121318111), we get a palindrome (2239449322).

The spelling of 1118131211 in words is "one billion, one hundred eighteen million, one hundred thirty-one thousand, two hundred eleven".