20331332231321 has 4 divisors (see below), whose sum is σ = 20337406728912. Its totient is φ = 20325257733732.

The previous prime is 20331332231311. The next prime is 20331332231351. The reversal of 20331332231321 is 12313223313302.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 20331332231321 - 2²² = 20331328037017 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20331332231311) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 3037243775 + ... + 3037250468.

It is an arithmetic number, because the mean of its divisors is an integer number (5084351682228).

Almost surely, 2^{20331332231321} is an apocalyptic number.

It is an amenable number.

20331332231321 is a deficient number, since it is larger than the sum of its proper divisors (6074497591).

20331332231321 is an equidigital number, since it uses as much as digits as its factorization.

20331332231321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6074497590.

The product of its (nonzero) digits is 11664, while the sum is 29.

Adding to 20331332231321 its reverse (12313223313302), we get a palindrome (32644555544623).

The spelling of 20331332231321 in words is "twenty trillion, three hundred thirty-one billion, three hundred thirty-two million, two hundred thirty-one thousand, three hundred twenty-one".