20331013321231 has 4 divisors (see below), whose sum is σ = 20331729003600. Its totient is φ = 20330297638864.

The previous prime is 20331013321217. The next prime is 20331013321247. The reversal of 20331013321231 is 13212331013302.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20331013321231 - 2¹⁹ = 20331012796943 is a prime.

It is a super-2 number, since 2×20331013321231² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20331013321196 and 20331013321205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20331013321261) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 357798571 + ... + 357855388.

It is an arithmetic number, because the mean of its divisors is an integer number (5082932250900).

Almost surely, 2^{20331013321231} is an apocalyptic number.

20331013321231 is a deficient number, since it is larger than the sum of its proper divisors (715682369).

20331013321231 is an equidigital number, since it uses as much as digits as its factorization.

20331013321231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 715682368.

The product of its (nonzero) digits is 1944, while the sum is 25.

Adding to 20331013321231 its reverse (13212331013302), we get a palindrome (33543344334533).

The spelling of 20331013321231 in words is "twenty trillion, three hundred thirty-one billion, thirteen million, three hundred twenty-one thousand, two hundred thirty-one".