1331322043420 has 24 divisors (see below), whose sum is σ = 2837504298384. Its totient is φ = 524580625536.

The previous prime is 1331322043397. The next prime is 1331322043531. The reversal of 1331322043420 is 243402231331.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 496760617 + ... + 496763296.

It is an arithmetic number, because the mean of its divisors is an integer number (118229345766).

Almost surely, 2^{1331322043420} is an apocalyptic number.

1331322043420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1331322043420 is an abundant number, since it is smaller than the sum of its proper divisors (1506182254964).

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

1331322043420 is a wasteful number, since it uses less digits than its factorization.

1331322043420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 993523989 (or 993523987 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 28.

Adding to 1331322043420 its reverse (243402231331), we get a palindrome (1574724274751).

The spelling of 1331322043420 in words is "one trillion, three hundred thirty-one billion, three hundred twenty-two million, forty-three thousand, four hundred twenty".