1222021120 has 52 divisors (see below), whose sum is σ = 2932541820. Its totient is φ = 488800256.

The previous prime is 1222021093. The next prime is 1222021121. The reversal of 1222021120 is 211202221.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 725979136 + 496041984 = 26944^2 + 22272^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 1222021120.

It is not an unprimeable number, because it can be changed into a prime (1222021121) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9355 + ... + 50314.

It is an arithmetic number, because the mean of its divisors is an integer number (56395035).

Almost surely, 2^1222021120 is an apocalyptic number.

1222021120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1222021120 is an abundant number, since it is smaller than the sum of its proper divisors (1710520700).

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

1222021120 is an frugal number, since it uses more digits than its factorization.

1222021120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59698 (or 59676 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 13.

The square root of 1222021120 is about 34957.4186690036. The cubic root of 1222021120 is about 1069.1194665747.

Adding to 1222021120 its reverse (211202221), we get a palindrome (1433223341).

The spelling of 1222021120 in words is "one billion, two hundred twenty-two million, twenty-one thousand, one hundred twenty".