22010002212221 has 4 divisors (see below), whose sum is σ = 22010952047772. Its totient is φ = 22009052376672.

The previous prime is 22010002212203. The next prime is 22010002212241. The reversal of 22010002212221 is 12221220001022.

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 8787222705625 + 13222779506596 = 2964325^2 + 3636314^2 .

It is a cyclic number.

It is not a de Polignac number, because 22010002212221 - 2¹⁴ = 22010002195837 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 22010002212221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22010002212241) 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, 474883016 + ... + 474929361.

It is an arithmetic number, because the mean of its divisors is an integer number (5502738011943).

Almost surely, 2^{22010002212221} is an apocalyptic number.

It is an amenable number.

22010002212221 is a deficient number, since it is larger than the sum of its proper divisors (949835551).

22010002212221 is an equidigital number, since it uses as much as digits as its factorization.

22010002212221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 949835550.

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

Adding to 22010002212221 its reverse (12221220001022), we get a palindrome (34231222213243).

The spelling of 22010002212221 in words is "twenty-two trillion, ten billion, two million, two hundred twelve thousand, two hundred twenty-one".