1331245921344 has 28 divisors (see below), whose sum is σ = 3522254834064. Its totient is φ = 443748640384.

The previous prime is 1331245921337. The next prime is 1331245921363. The reversal of 1331245921344 is 4431295421331.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 1331245921296 and 1331245921305.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3466786062 + ... + 3466786445.

Almost surely, 2^{1331245921344} is an apocalyptic number.

It is an amenable number.

1331245921344 is an abundant number, since it is smaller than the sum of its proper divisors (2191008912720).

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

1331245921344 is an equidigital number, since it uses as much as digits as its factorization.

1331245921344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6933572522 (or 6933572512 counting only the distinct ones).

The product of its digits is 311040, while the sum is 42.

The spelling of 1331245921344 in words is "one trillion, three hundred thirty-one billion, two hundred forty-five million, nine hundred twenty-one thousand, three hundred forty-four".