1112331220 has 144 divisors (see below), whose sum is σ = 3160692864. Its totient is φ = 319968000.

The previous prime is 1112331211. The next prime is 1112331251. The reversal of 1112331220 is 221332111.

It is a junction number, because it is equal to n+sod(n) for n = 1112331194 and 1112331203.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 217695 + ... + 222745.

It is an arithmetic number, because the mean of its divisors is an integer number (21949256).

Almost surely, 2^1112331220 is an apocalyptic number.

1112331220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1112331220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1580346432).

1112331220 is an abundant number, since it is smaller than the sum of its proper divisors (2048361644).

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

1112331220 is a wasteful number, since it uses less digits than its factorization.

1112331220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5102 (or 5089 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 16.

The square root of 1112331220 is about 33351.6299451766. The cubic root of 1112331220 is about 1036.1231461670.

Adding to 1112331220 its reverse (221332111), we get a palindrome (1333663331).

The spelling of 1112331220 in words is "one billion, one hundred twelve million, three hundred thirty-one thousand, two hundred twenty".