1222311120 has 160 divisors (see below), whose sum is σ = 3926748672. Its totient is φ = 314313216.

The previous prime is 1222311109. The next prime is 1222311127. The reversal of 1222311120 is 211132221.

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 1222311120.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1222311127) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 855847 + ... + 857273.

Almost surely, 2^1222311120 is an apocalyptic number.

1222311120 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 1222311120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1963374336).

1222311120 is an abundant number, since it is smaller than the sum of its proper divisors (2704437552).

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

1222311120 is a wasteful number, since it uses less digits than its factorization.

1222311120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1569 (or 1563 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 15.

The square root of 1222311120 is about 34961.5663264677. The cubic root of 1222311120 is about 1069.2040314314.

Adding to 1222311120 its reverse (211132221), we get a palindrome (1433443341).

The spelling of 1222311120 in words is "one billion, two hundred twenty-two million, three hundred eleven thousand, one hundred twenty".