1122320220 has 96 divisors (see below), whose sum is σ = 3601317888. Its totient is φ = 255823872.

The previous prime is 1122320203. The next prime is 1122320237. The reversal of 1122320220 is 220232211.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1122320203) and next prime (1122320237).

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 1122320220.

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 31 ways as a sum of consecutive naturals, for example, 157372 + ... + 164348.

It is an arithmetic number, because the mean of its divisors is an integer number (37513728).

Almost surely, 2^1122320220 is an apocalyptic number.

1122320220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1122320220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1800658944).

1122320220 is an abundant number, since it is smaller than the sum of its proper divisors (2478997668).

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

1122320220 is a wasteful number, since it uses less digits than its factorization.

1122320220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7379 (or 7377 counting only the distinct ones).

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

The square root of 1122320220 is about 33501.0480433075. The cubic root of 1122320220 is about 1039.2154524397.

Adding to 1122320220 its reverse (220232211), we get a palindrome (1342552431).

The spelling of 1122320220 in words is "one billion, one hundred twenty-two million, three hundred twenty thousand, two hundred twenty".