22201200012221 has 16 divisors (see below), whose sum is σ = 22589956851120. Its totient is φ = 21813248056320.

The previous prime is 22201200012217. The next prime is 22201200012281. The reversal of 22201200012221 is 12221000210222.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 1750355460100 + 20450844552121 = 1323010^2 + 4522261^2 .

It is a cyclic number.

It is not a de Polignac number, because 22201200012221 - 2² = 22201200012217 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 22201200012221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22201200012281) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 933871091 + ... + 933894863.

It is an arithmetic number, because the mean of its divisors is an integer number (1411872303195).

Almost surely, 2^{22201200012221} is an apocalyptic number.

It is an amenable number.

22201200012221 is a deficient number, since it is larger than the sum of its proper divisors (388756838899).

22201200012221 is a wasteful number, since it uses less digits than its factorization.

22201200012221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40016.

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

Adding to 22201200012221 its reverse (12221000210222), we get a palindrome (34422200222443).

The spelling of 22201200012221 in words is "twenty-two trillion, two hundred one billion, two hundred million, twelve thousand, two hundred twenty-one".