1320331231020 has 24 divisors (see below), whose sum is σ = 3696927447024. Its totient is φ = 352088328256.

The previous prime is 1320331230971. The next prime is 1320331231027. The reversal of 1320331231020 is 201321330231.

It is a super-2 number, since 2×1320331231020² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1320331231027) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11002760199 + ... + 11002760318.

It is an arithmetic number, because the mean of its divisors is an integer number (154038643626).

Almost surely, 2^{1320331231020} is an apocalyptic number.

1320331231020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1320331231020 is an abundant number, since it is smaller than the sum of its proper divisors (2376596216004).

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

1320331231020 is a wasteful number, since it uses less digits than its factorization.

1320331231020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22005520529 (or 22005520527 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 21.

Adding to 1320331231020 its reverse (201321330231), we get a palindrome (1521652561251).

The spelling of 1320331231020 in words is "one trillion, three hundred twenty billion, three hundred thirty-one million, two hundred thirty-one thousand, twenty".