1231113331 has 8 divisors (see below), whose sum is σ = 1407532544. Its totient is φ = 1054830600.

The previous prime is 1231113329. The next prime is 1231113337. The reversal of 1231113331 is 1333111321.

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 1231113331 - 2¹ = 1231113329 is a prime.

It is a super-2 number, since 2×1231113331² = 3031280067531831122, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1231113299 and 1231113308.

It is not an unprimeable number, because it can be changed into a prime (1231113337) 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, 13995 + ... + 51556.

It is an arithmetic number, because the mean of its divisors is an integer number (175941568).

Almost surely, 2^1231113331 is an apocalyptic number.

1231113331 is a deficient number, since it is larger than the sum of its proper divisors (176419213).

1231113331 is an equidigital number, since it uses as much as digits as its factorization.

1231113331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68241.

The product of its digits is 162, while the sum is 19.

The square root of 1231113331 is about 35087.2246123856. The cubic root of 1231113331 is about 1071.7644428761.

Adding to 1231113331 its reverse (1333111321), we get a palindrome (2564224652).

The spelling of 1231113331 in words is "one billion, two hundred thirty-one million, one hundred thirteen thousand, three hundred thirty-one".