22201010221 has 8 divisors (see below), whose sum is σ = 24120363960. Its totient is φ = 20311882752.

The previous prime is 22201010219. The next prime is 22201010257. The reversal of 22201010221 is 12201010222.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 315062500 + 21885947721 = 17750^2 + 147939^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 22201010221 - 2¹ = 22201010219 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (13).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22201010201) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7555036 + ... + 7557973.

It is an arithmetic number, because the mean of its divisors is an integer number (3015045495).

Almost surely, 2^22201010221 is an apocalyptic number.

It is an amenable number.

22201010221 is a deficient number, since it is larger than the sum of its proper divisors (1919353739).

22201010221 is a wasteful number, since it uses less digits than its factorization.

22201010221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15113135.

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

Adding to 22201010221 its reverse (12201010222), we get a palindrome (34402020443).

Subtracting from 22201010221 its reverse (12201010222), we obtain a palindrome (9999999999).

The spelling of 22201010221 in words is "twenty-two billion, two hundred one million, ten thousand, two hundred twenty-one".