22211002201221 has 12 divisors (see below), whose sum is σ = 32082744902572. Its totient is φ = 14807248877376.

The previous prime is 22211002201211. The next prime is 22211002201229. The reversal of 22211002201221 is 12210220011222.

It is a happy number.

22211002201221 is a `hidden beast` number, since 2 + 221 + 1 + 0 + 0 + 220 + 1 + 221 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 2916410062500 + 19294592138721 = 1707750^2 + 4392561^2 .

It is not a de Polignac number, because 22211002201221 - 2¹¹ = 22211002199173 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22211002201194 and 22211002201203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22211002201229) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5502946 + ... + 8643171.

Almost surely, 2^{22211002201221} is an apocalyptic number.

It is an amenable number.

22211002201221 is a deficient number, since it is larger than the sum of its proper divisors (9871742701351).

22211002201221 is a wasteful number, since it uses less digits than its factorization.

22211002201221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14320580 (or 14320577 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 22211002201221 its reverse (12210220011222), we get a palindrome (34421222212443).

The spelling of 22211002201221 in words is "twenty-two trillion, two hundred eleven billion, two million, two hundred one thousand, two hundred twenty-one".