201044421221 has 16 divisors (see below), whose sum is σ = 237703136640. Its totient is φ = 166370984640.

The previous prime is 201044421211. The next prime is 201044421247. The reversal of 201044421221 is 122124440102.

It is a de Polignac number, because none of the positive numbers 2^k-201044421221 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 (201044421211) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5896595 + ... + 5930591.

It is an arithmetic number, because the mean of its divisors is an integer number (14856446040).

Almost surely, 2^201044421221 is an apocalyptic number.

It is an amenable number.

201044421221 is a deficient number, since it is larger than the sum of its proper divisors (36658715419).

201044421221 is a wasteful number, since it uses less digits than its factorization.

201044421221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63164.

The product of its (nonzero) digits is 1024, while the sum is 23.

Adding to 201044421221 its reverse (122124440102), we get a palindrome (323168861323).

The spelling of 201044421221 in words is "two hundred one billion, forty-four million, four hundred twenty-one thousand, two hundred twenty-one".