22002010212221 has 4 divisors (see below), whose sum is σ = 23694472536252. Its totient is φ = 20309547888192.

The previous prime is 22002010212137. The next prime is 22002010212223. The reversal of 22002010212221 is 12221201020022.

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 3923909344996 + 18078100867225 = 1980886^2 + 4251835^2 .

It is a cyclic number.

It is not a de Polignac number, because 22002010212221 - 2²² = 22002006017917 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 22002010212221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22002010212223) 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, 846231161996 + ... + 846231162021.

It is an arithmetic number, because the mean of its divisors is an integer number (5923618134063).

Almost surely, 2^{22002010212221} is an apocalyptic number.

It is an amenable number.

22002010212221 is a deficient number, since it is larger than the sum of its proper divisors (1692462324031).

22002010212221 is a wasteful number, since it uses less digits than its factorization.

22002010212221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1692462324030.

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

Adding to 22002010212221 its reverse (12221201020022), we get a palindrome (34223211232243).

The spelling of 22002010212221 in words is "twenty-two trillion, two billion, ten million, two hundred twelve thousand, two hundred twenty-one".