1103212220 has 96 divisors (see below), whose sum is σ = 2574028800. Its totient is φ = 393845760.

The previous prime is 1103212213. The next prime is 1103212237. The reversal of 1103212220 is 222123011.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 1103212195 and 1103212204.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4947029 + ... + 4947251.

It is an arithmetic number, because the mean of its divisors is an integer number (26812800).

Almost surely, 2^1103212220 is an apocalyptic number.

1103212220 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 1103212220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1287014400).

1103212220 is an abundant number, since it is smaller than the sum of its proper divisors (1470816580).

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

1103212220 is a wasteful number, since it uses less digits than its factorization.

1103212220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 555 (or 553 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 14.

The square root of 1103212220 is about 33214.6386402140. The cubic root of 1103212220 is about 1033.2839604112.

Adding to 1103212220 its reverse (222123011), we get a palindrome (1325335231).

The spelling of 1103212220 in words is "one billion, one hundred three million, two hundred twelve thousand, two hundred twenty".