1320231020 has 24 divisors (see below), whose sum is σ = 2773180368. Its totient is φ = 527960000.

The previous prime is 1320231019. The next prime is 1320231041. The reversal of 1320231020 is 201320231.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 1320230986 and 1320231004.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 129095 + ... + 138945.

It is an arithmetic number, because the mean of its divisors is an integer number (115549182).

Almost surely, 2^1320231020 is an apocalyptic number.

1320231020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1320231020 is an abundant number, since it is smaller than the sum of its proper divisors (1452949348).

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

1320231020 is a wasteful number, since it uses less digits than its factorization.

1320231020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16561 (or 16559 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 14.

The square root of 1320231020 is about 36334.9834181880. The cubic root of 1320231020 is about 1097.0253017035.

Adding to 1320231020 its reverse (201320231), we get a palindrome (1521551251).

The spelling of 1320231020 in words is "one billion, three hundred twenty million, two hundred thirty-one thousand, twenty".