20002201100221 has 4 divisors (see below), whose sum is σ = 20467368567712. Its totient is φ = 19537033632732.

The previous prime is 20002201100207. The next prime is 20002201100237. The reversal of 20002201100221 is 12200110220002.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20002201100221 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 (20002201100281) 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, 232583733681 + ... + 232583733766.

It is an arithmetic number, because the mean of its divisors is an integer number (5116842141928).

Almost surely, 2^{20002201100221} is an apocalyptic number.

It is an amenable number.

20002201100221 is a deficient number, since it is larger than the sum of its proper divisors (465167467491).

20002201100221 is an equidigital number, since it uses as much as digits as its factorization.

20002201100221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 465167467490.

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 20002201100221 its reverse (12200110220002), we get a palindrome (32202311320223).

The spelling of 20002201100221 in words is "twenty trillion, two billion, two hundred one million, one hundred thousand, two hundred twenty-one".