1223031120 has 80 divisors (see below), whose sum is σ = 3794757120. Its totient is φ = 325852672.

The previous prime is 1223031109. The next prime is 1223031137. The reversal of 1223031120 is 211303221.

It is a tau number, because it is divible by the number of its divisors (80).

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 1223031120.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 528526 + ... + 530834.

It is an arithmetic number, because the mean of its divisors is an integer number (47434464).

Almost surely, 2^1223031120 is an apocalyptic number.

1223031120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1223031120 is an abundant number, since it is smaller than the sum of its proper divisors (2571726000).

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

1223031120 is a wasteful number, since it uses less digits than its factorization.

1223031120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4532 (or 4526 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 15.

The square root of 1223031120 is about 34971.8618320501. The cubic root of 1223031120 is about 1069.4139277457.

Adding to 1223031120 its reverse (211303221), we get a palindrome (1434334341).

The spelling of 1223031120 in words is "one billion, two hundred twenty-three million, thirty-one thousand, one hundred twenty".