20001101030221 has 4 divisors (see below), whose sum is σ = 20040395924700. Its totient is φ = 19961806135744.

The previous prime is 20001101030203. The next prime is 20001101030341. The reversal of 20001101030221 is 12203010110002.

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 9629570954025 + 10371530076196 = 3103155^2 + 3220486^2 .

It is a cyclic number.

It is not a de Polignac number, because 20001101030221 - 2²⁵ = 20001067475789 is a prime.

It is a super-2 number, since 2×20001101030221² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20001101037221) 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, 19647446476 + ... + 19647447493.

It is an arithmetic number, because the mean of its divisors is an integer number (5010098981175).

Almost surely, 2^{20001101030221} is an apocalyptic number.

It is an amenable number.

20001101030221 is a deficient number, since it is larger than the sum of its proper divisors (39294894479).

20001101030221 is an equidigital number, since it uses as much as digits as its factorization.

20001101030221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39294894478.

The product of its (nonzero) digits is 24, while the sum is 13.

Adding to 20001101030221 its reverse (12203010110002), we get a palindrome (32204111140223).

The spelling of 20001101030221 in words is "twenty trillion, one billion, one hundred one million, thirty thousand, two hundred twenty-one".