20001031321201 has 32 divisors (see below), whose sum is σ = 23051878656768. Its totient is φ = 16999094004480.

The previous prime is 20001031321151. The next prime is 20001031321237. The reversal of 20001031321201 is 10212313010002.

It is a de Polignac number, because none of the positive numbers 2^k-20001031321201 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20001031321301) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1406436271 + ... + 1406450491.

It is an arithmetic number, because the mean of its divisors is an integer number (720371208024).

Almost surely, 2^{20001031321201} is an apocalyptic number.

It is an amenable number.

20001031321201 is a deficient number, since it is larger than the sum of its proper divisors (3050847335567).

20001031321201 is a wasteful number, since it uses less digits than its factorization.

20001031321201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17161.

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 20001031321201 its reverse (10212313010002), we get a palindrome (30213344331203).

The spelling of 20001031321201 in words is "twenty trillion, one billion, thirty-one million, three hundred twenty-one thousand, two hundred one".