1320231120 has 160 divisors (see below), whose sum is σ = 4423383552. Its totient is φ = 323813376.

The previous prime is 1320231109. The next prime is 1320231179. The reversal of 1320231120 is 211320231.

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 1320231120.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1144464 + ... + 1145616.

Almost surely, 2^1320231120 is an apocalyptic number.

1320231120 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 1320231120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2211691776).

1320231120 is an abundant number, since it is smaller than the sum of its proper divisors (3103152432).

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

1320231120 is a wasteful number, since it uses less digits than its factorization.

1320231120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1549 (or 1543 counting only the distinct ones).

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

The square root of 1320231120 is about 36334.9847942723. The cubic root of 1320231120 is about 1097.0253294013.

Adding to 1320231120 its reverse (211320231), we get a palindrome (1531551351).

The spelling of 1320231120 in words is "one billion, three hundred twenty million, two hundred thirty-one thousand, one hundred twenty".