1231365120 has 88 divisors (see below), whose sum is σ = 3938493504. Its totient is φ = 328359936.

The previous prime is 1231365101. The next prime is 1231365133. The reversal of 1231365120 is 215631321.

It is a super-2 number, since 2×1231365120² = 3032520117505228800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24724 + ... + 55443.

It is an arithmetic number, because the mean of its divisors is an integer number (44755608).

Almost surely, 2^1231365120 is an apocalyptic number.

1231365120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1231365120 is an abundant number, since it is smaller than the sum of its proper divisors (2707128384).

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

1231365120 is an equidigital number, since it uses as much as digits as its factorization.

1231365120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80195 (or 80177 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 24.

The square root of 1231365120 is about 35090.8124727827. The cubic root of 1231365120 is about 1071.8375041438.

Adding to 1231365120 its reverse (215631321), we get a palindrome (1446996441).

The spelling of 1231365120 in words is "one billion, two hundred thirty-one million, three hundred sixty-five thousand, one hundred twenty".