1111312209 has 12 divisors (see below), whose sum is σ = 1723668144. Its totient is φ = 635035464.

The previous prime is 1111312201. The next prime is 1111312247. The reversal of 1111312209 is 9022131111.

It is a happy number.

It is not a de Polignac number, because 1111312209 - 2³ = 1111312201 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is not an unprimeable number, because it can be changed into a prime (1111312201) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3779827 + ... + 3780120.

It is an arithmetic number, because the mean of its divisors is an integer number (143639012).

Almost surely, 2^1111312209 is an apocalyptic number.

It is an amenable number.

1111312209 is a deficient number, since it is larger than the sum of its proper divisors (612355935).

1111312209 is an equidigital number, since it uses as much as digits as its factorization.

1111312209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7559964 (or 7559957 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 21.

The square root of 1111312209 is about 33336.3496651928. The cubic root of 1111312209 is about 1035.8066506717.

The spelling of 1111312209 in words is "one billion, one hundred eleven million, three hundred twelve thousand, two hundred nine".