1222332220 has 12 divisors (see below), whose sum is σ = 2566897704. Its totient is φ = 488932880.

The previous prime is 1222332203. The next prime is 1222332239. The reversal of 1222332220 is 222332221.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30558286 + ... + 30558325.

It is an arithmetic number, because the mean of its divisors is an integer number (213908142).

Almost surely, 2^1222332220 is an apocalyptic number.

1222332220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1222332220 is an abundant number, since it is smaller than the sum of its proper divisors (1344565484).

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

1222332220 is a wasteful number, since it uses less digits than its factorization.

1222332220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61116620 (or 61116618 counting only the distinct ones).

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

The square root of 1222332220 is about 34961.8680851009. The cubic root of 1222332220 is about 1069.2101837317.

Adding to 1222332220 its reverse (222332221), we get a palindrome (1444664441).

Subtracting from 1222332220 its reverse (222332221), we obtain a palindrome (999999999).

The spelling of 1222332220 in words is "one billion, two hundred twenty-two million, three hundred thirty-two thousand, two hundred twenty".