1320020331 has 16 divisors (see below), whose sum is σ = 2076346368. Its totient is φ = 729964800.

The previous prime is 1320020287. The next prime is 1320020341. The reversal of 1320020331 is 1330200231.

It is not a de Polignac number, because 1320020331 - 2⁷ = 1320020203 is a prime.

It is a super-2 number, since 2×1320020331² = 3484907348506699122, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1320020331.

It is not an unprimeable number, because it can be changed into a prime (1320020341) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1013190 + ... + 1014491.

It is an arithmetic number, because the mean of its divisors is an integer number (129771648).

Almost surely, 2^1320020331 is an apocalyptic number.

1320020331 is a deficient number, since it is larger than the sum of its proper divisors (756326037).

1320020331 is a wasteful number, since it uses less digits than its factorization.

1320020331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2027722.

The product of its (nonzero) digits is 108, while the sum is 15.

The square root of 1320020331 is about 36332.0840442714. The cubic root of 1320020331 is about 1096.9669423567.

Adding to 1320020331 its reverse (1330200231), we get a palindrome (2650220562).

The spelling of 1320020331 in words is "one billion, three hundred twenty million, twenty thousand, three hundred thirty-one".