1220322120 has 64 divisors (see below), whose sum is σ = 3853656000. Its totient is φ = 308291328.

The previous prime is 1220322119. The next prime is 1220322127. The reversal of 1220322120 is 212230221.

It is a happy number.

It is a super-2 number, since 2×1220322120² = 2978372153122588800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 1220322120.

It is not an unprimeable number, because it can be changed into a prime (1220322127) 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 15 ways as a sum of consecutive naturals, for example, 265335 + ... + 269894.

It is an arithmetic number, because the mean of its divisors is an integer number (60213375).

Almost surely, 2^1220322120 is an apocalyptic number.

1220322120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1220322120 is an abundant number, since it is smaller than the sum of its proper divisors (2633333880).

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

1220322120 is a wasteful number, since it uses less digits than its factorization.

1220322120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 535262 (or 535258 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 15.

The square root of 1220322120 is about 34933.1092231997. The cubic root of 1220322120 is about 1068.6237641675.

Adding to 1220322120 its reverse (212230221), we get a palindrome (1432552341).

The spelling of 1220322120 in words is "one billion, two hundred twenty million, three hundred twenty-two thousand, one hundred twenty".