1131103220 has 24 divisors (see below), whose sum is σ = 2558034024. Its totient is φ = 417638016.

The previous prime is 1131103217. The next prime is 1131103241. The reversal of 1131103220 is 223011311.

It can be written as a sum of positive squares in 4 ways, for example, as 4024036 + 1127079184 = 2006^2 + 33572^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1131103195 and 1131103204.

It is a congruent number.

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, 2174939 + ... + 2175458.

It is an arithmetic number, because the mean of its divisors is an integer number (106584751).

Almost surely, 2^1131103220 is an apocalyptic number.

1131103220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1131103220 is an abundant number, since it is smaller than the sum of its proper divisors (1426930804).

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

1131103220 is a wasteful number, since it uses less digits than its factorization.

1131103220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4350419 (or 4350417 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 14.

The square root of 1131103220 is about 33631.8780326047. The cubic root of 1131103220 is about 1041.9192923565.

Adding to 1131103220 its reverse (223011311), we get a palindrome (1354114531).

The spelling of 1131103220 in words is "one billion, one hundred thirty-one million, one hundred three thousand, two hundred twenty".