1231111330 has 32 divisors (see below), whose sum is σ = 2238529536. Its totient is φ = 487456704.

The previous prime is 1231111309. The next prime is 1231111331. The reversal of 1231111330 is 331111321.

It is not an unprimeable number, because it can be changed into a prime (1231111331) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 770092 + ... + 771688.

It is an arithmetic number, because the mean of its divisors is an integer number (69954048).

Almost surely, 2^1231111330 is an apocalyptic number.

1231111330 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1231111330 is a deficient number, since it is larger than the sum of its proper divisors (1007418206).

1231111330 is a wasteful number, since it uses less digits than its factorization.

1231111330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2338.

The product of its (nonzero) digits is 54, while the sum is 16.

The square root of 1231111330 is about 35087.1960977220. The cubic root of 1231111330 is about 1071.7638622088.

Adding to 1231111330 its reverse (331111321), we get a palindrome (1562222651).

Subtracting from 1231111330 its reverse (331111321), we obtain a palindrome (900000009).

The spelling of 1231111330 in words is "one billion, two hundred thirty-one million, one hundred eleven thousand, three hundred thirty".