1123222220 has 24 divisors (see below), whose sum is σ = 2361093504. Its totient is φ = 448845696.

The previous prime is 1123222211. The next prime is 1123222223. The reversal of 1123222220 is 222223211.

It is not an unprimeable number, because it can be changed into a prime (1123222223) by changing a digit.

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, 6524 + ... + 47843.

It is an arithmetic number, because the mean of its divisors is an integer number (98378896).

Almost surely, 2^1123222220 is an apocalyptic number.

1123222220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1123222220 is an abundant number, since it is smaller than the sum of its proper divisors (1237871284).

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

1123222220 is a wasteful number, since it uses less digits than its factorization.

1123222220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55409 (or 55407 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 1123222220 is about 33514.5076049164. The cubic root of 1123222220 is about 1039.4937810052.

Adding to 1123222220 its reverse (222223211), we get a palindrome (1345445431).

Subtracting from 1123222220 its reverse (222223211), we obtain a palindrome (900999009).

The spelling of 1123222220 in words is "one billion, one hundred twenty-three million, two hundred twenty-two thousand, two hundred twenty".