201000020100221 has 4 divisors (see below), whose sum is σ = 201011824899072. Its totient is φ = 200988215301372.

The previous prime is 201000020100211. The next prime is 201000020100239. The reversal of 201000020100221 is 122001020000102.

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 not a de Polignac number, because 201000020100221 - 2⁶ = 201000020100157 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 (201000020100211) 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, 5902373885 + ... + 5902407938.

It is an arithmetic number, because the mean of its divisors is an integer number (50252956224768).

Almost surely, 2^{201000020100221} is an apocalyptic number.

It is an amenable number.

201000020100221 is a deficient number, since it is larger than the sum of its proper divisors (11804798851).

201000020100221 is a wasteful number, since it uses less digits than its factorization.

201000020100221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11804798850.

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 201000020100221 its reverse (122001020000102), we get a palindrome (323001040100323).

The spelling of 201000020100221 in words is "two hundred one trillion, twenty million, one hundred thousand, two hundred twenty-one".