20331000221101 has 4 divisors (see below), whose sum is σ = 20331022283100. Its totient is φ = 20330978159104.

The previous prime is 20331000221071. The next prime is 20331000221159. The reversal of 20331000221101 is 10112200013302.

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 15929270340201 + 4401729880900 = 3991149^2 + 2098030^2 .

It is a cyclic number.

It is not a de Polignac number, because 20331000221101 - 2¹¹ = 20331000219053 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20331000225101) 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, 9585556 + ... + 11512813.

It is an arithmetic number, because the mean of its divisors is an integer number (5082755570775).

Almost surely, 2^{20331000221101} is an apocalyptic number.

It is an amenable number.

20331000221101 is a deficient number, since it is larger than the sum of its proper divisors (22061999).

20331000221101 is an equidigital number, since it uses as much as digits as its factorization.

20331000221101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22061998.

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

Adding to 20331000221101 its reverse (10112200013302), we get a palindrome (30443200234403).

The spelling of 20331000221101 in words is "twenty trillion, three hundred thirty-one billion, two hundred twenty-one thousand, one hundred one".