1123113220 has 24 divisors (see below), whose sum is σ = 2361812544. Its totient is φ = 448621536.

The previous prime is 1123113179. The next prime is 1123113221. The reversal of 1123113220 is 223113211.

It is a super-2 number, since 2×1123113220² = 2522766609877536800, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1123113194 and 1123113203.

It is not an unprimeable number, because it can be changed into a prime (1123113221) 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, 24082 + ... + 53161.

It is an arithmetic number, because the mean of its divisors is an integer number (98408856).

Almost surely, 2^1123113220 is an apocalyptic number.

1123113220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1123113220 is an abundant number, since it is smaller than the sum of its proper divisors (1238699324).

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

1123113220 is a wasteful number, since it uses less digits than its factorization.

1123113220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77979 (or 77977 counting only the distinct ones).

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

The square root of 1123113220 is about 33512.8814040213. The cubic root of 1123113220 is about 1039.4601549826.

Adding to 1123113220 its reverse (223113211), we get a palindrome (1346226431).

Subtracting from 1123113220 its reverse (223113211), we obtain a palindrome (900000009).

The spelling of 1123113220 in words is "one billion, one hundred twenty-three million, one hundred thirteen thousand, two hundred twenty".