1222233220 has 48 divisors (see below), whose sum is σ = 2768174640. Its totient is φ = 450625536.

The previous prime is 1222233209. The next prime is 1222233251. The reversal of 1222233220 is 223322221.

It can be written as a sum of positive squares in 8 ways, for example, as 103063104 + 1119170116 = 10152^2 + 33454^2 .

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 15 ways as a sum of consecutive naturals, for example, 196884 + ... + 202996.

It is an arithmetic number, because the mean of its divisors is an integer number (57670305).

Almost surely, 2^1222233220 is an apocalyptic number.

1222233220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1222233220 is an abundant number, since it is smaller than the sum of its proper divisors (1545941420).

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

1222233220 is a wasteful number, since it uses less digits than its factorization.

1222233220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6904 (or 6902 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 19.

The square root of 1222233220 is about 34960.4522281964. The cubic root of 1222233220 is about 1069.1813168753.

Adding to 1222233220 its reverse (223322221), we get a palindrome (1445555441).

The spelling of 1222233220 in words is "one billion, two hundred twenty-two million, two hundred thirty-three thousand, two hundred twenty".