1111231120 has 40 divisors (see below), whose sum is σ = 2585816640. Its totient is φ = 444113280.

The previous prime is 1111231117. The next prime is 1111231151. The reversal of 1111231120 is 211321111.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (40).

It is a self number, because there is not a number n which added to its sum of digits gives 1111231120.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 100255 + ... + 110785.

It is an arithmetic number, because the mean of its divisors is an integer number (64645416).

Almost surely, 2^1111231120 is an apocalyptic number.

1111231120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1111231120 is an abundant number, since it is smaller than the sum of its proper divisors (1474585520).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1111231120 is a wasteful number, since it uses less digits than its factorization.

1111231120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11863 (or 11857 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 13.

The square root of 1111231120 is about 33335.1334180621. The cubic root of 1111231120 is about 1035.7814568609.

Adding to 1111231120 its reverse (211321111), we get a palindrome (1322552231).

The spelling of 1111231120 in words is "one billion, one hundred eleven million, two hundred thirty-one thousand, one hundred twenty".