22102210020221 has 4 divisors (see below), whose sum is σ = 22404980020572. Its totient is φ = 21799440019872.

The previous prime is 22102210020199. The next prime is 22102210020259. The reversal of 22102210020221 is 12202001220122.

It is a happy number.

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 17567716600996 + 4534493419225 = 4191386^2 + 2129435^2 .

It is a cyclic number.

It is not a de Polignac number, because 22102210020221 - 2¹⁴ = 22102210003837 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 22102210020221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22102210023221) 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, 151385000066 + ... + 151385000211.

It is an arithmetic number, because the mean of its divisors is an integer number (5601245005143).

Almost surely, 2^{22102210020221} is an apocalyptic number.

It is an amenable number.

22102210020221 is a deficient number, since it is larger than the sum of its proper divisors (302770000351).

22102210020221 is an equidigital number, since it uses as much as digits as its factorization.

22102210020221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 302770000350.

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 22102210020221 its reverse (12202001220122), we get a palindrome (34304211240343).

The spelling of 22102210020221 in words is "twenty-two trillion, one hundred two billion, two hundred ten million, twenty thousand, two hundred twenty-one".