1113123220 has 24 divisors (see below), whose sum is σ = 2550064608. Its totient is φ = 404772000.

The previous prime is 1113123217. The next prime is 1113123233. The reversal of 1113123220 is 223213111.

It is a junction number, because it is equal to n+sod(n) for n = 1113123194 and 1113123203.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2529606 + ... + 2530045.

It is an arithmetic number, because the mean of its divisors is an integer number (106252692).

Almost surely, 2^1113123220 is an apocalyptic number.

1113123220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1113123220 is an abundant number, since it is smaller than the sum of its proper divisors (1436941388).

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

1113123220 is a wasteful number, since it uses less digits than its factorization.

1113123220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5059671 (or 5059669 counting only the distinct ones).

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

The square root of 1113123220 is about 33363.5013150598. The cubic root of 1113123220 is about 1036.3690006484.

Adding to 1113123220 its reverse (223213111), we get a palindrome (1336336331).

The spelling of 1113123220 in words is "one billion, one hundred thirteen million, one hundred twenty-three thousand, two hundred twenty".