20331031321201 has 4 divisors (see below), whose sum is σ = 20352637094004. Its totient is φ = 20309425548400.

The previous prime is 20331031321177. The next prime is 20331031321243. The reversal of 20331031321201 is 10212313013302.

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

It can be written as a sum of positive squares in 2 ways, for example, as 9801914901601 + 10529116419600 = 3130801^2 + 3244860^2 .

It is a cyclic number.

It is not a de Polignac number, because 20331031321201 - 2²⁹ = 20330494450289 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20331031321001) 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, 10802884990 + ... + 10802886871.

It is an arithmetic number, because the mean of its divisors is an integer number (5088159273501).

Almost surely, 2^{20331031321201} is an apocalyptic number.

It is an amenable number.

20331031321201 is a deficient number, since it is larger than the sum of its proper divisors (21605772803).

20331031321201 is an equidigital number, since it uses as much as digits as its factorization.

20331031321201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21605772802.

The product of its (nonzero) digits is 648, while the sum is 22.

Adding to 20331031321201 its reverse (10212313013302), we get a palindrome (30543344334503).

The spelling of 20331031321201 in words is "twenty trillion, three hundred thirty-one billion, thirty-one million, three hundred twenty-one thousand, two hundred one".