1111313331 has 16 divisors (see below), whose sum is σ = 1649306400. Its totient is φ = 739563264.

The previous prime is 1111313317. The next prime is 1111313339. The reversal of 1111313331 is 1333131111.

1111313331 is a `hidden beast` number, since 11 + 11 + 313 + 331 = 666.

It is not a de Polignac number, because 1111313331 - 2⁶ = 1111313267 is a prime.

It is a super-2 number, since 2×1111313331² = 2470034639316631122, which contains 22 as substring.

It is a nude number because it is divisible by every one of its digits.

It is not an unprimeable number, because it can be changed into a prime (1111313339) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20806 + ... + 51531.

It is an arithmetic number, because the mean of its divisors is an integer number (103081650).

Almost surely, 2^1111313331 is an apocalyptic number.

1111313331 is a deficient number, since it is larger than the sum of its proper divisors (537993069).

1111313331 is an equidigital number, since it uses as much as digits as its factorization.

1111313331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72915 (or 72909 counting only the distinct ones).

The product of its digits is 81, while the sum is 18.

The square root of 1111313331 is about 33336.3664936657. The cubic root of 1111313331 is about 1035.8069992610.

Adding to 1111313331 its reverse (1333131111), we get a palindrome (2444444442).

The spelling of 1111313331 in words is "one billion, one hundred eleven million, three hundred thirteen thousand, three hundred thirty-one".