1131103211 has 32 divisors (see below), whose sum is σ = 1445040000. Its totient is φ = 880889856.

The previous prime is 1131103199. The next prime is 1131103217. The reversal of 1131103211 is 1123011311.

It is a happy number.

It is not a de Polignac number, because 1131103211 - 2⁶ = 1131103147 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1131103217) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 165755 + ... + 172443.

It is an arithmetic number, because the mean of its divisors is an integer number (45157500).

Almost surely, 2^1131103211 is an apocalyptic number.

1131103211 is a deficient number, since it is larger than the sum of its proper divisors (313936789).

1131103211 is an equidigital number, since it uses as much as digits as its factorization.

1131103211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6756 (or 6742 counting only the distinct ones).

The product of its (nonzero) digits is 18, while the sum is 14.

The square root of 1131103211 is about 33631.8778988031. The cubic root of 1131103211 is about 1041.9192895931.

Adding to 1131103211 its reverse (1123011311), we get a palindrome (2254114522).

The spelling of 1131103211 in words is "one billion, one hundred thirty-one million, one hundred three thousand, two hundred eleven".