22211221012206 has 16 divisors (see below), whose sum is σ = 44472750576384. Its totient is φ = 7395355578744.

The previous prime is 22211221012151. The next prime is 22211221012207. The reversal of 22211221012206 is 60221012211222.

It is a happy number.

It is a super-2 number, since 2×22211221012206² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22211221012207) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2096183926 + ... + 2096194521.

It is an arithmetic number, because the mean of its divisors is an integer number (2779546911024).

Almost surely, 2^{22211221012206} is an apocalyptic number.

22211221012206 is an abundant number, since it is smaller than the sum of its proper divisors (22261529564178).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

22211221012206 is a wasteful number, since it uses less digits than its factorization.

22211221012206 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4192379335.

The product of its (nonzero) digits is 768, while the sum is 24.

Adding to 22211221012206 its reverse (60221012211222), we get a palindrome (82432233223428).

The spelling of 22211221012206 in words is "twenty-two trillion, two hundred eleven billion, two hundred twenty-one million, twelve thousand, two hundred six".