22221110121211 has 2 divisors, whose sum is σ = 22221110121212. Its totient is φ = 22221110121210.

The previous prime is 22221110121193. The next prime is 22221110121271. The reversal of 22221110121211 is 11212101112222.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22221110121211 is a prime.

It is a super-2 number, since 2×22221110121211² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (22221110121271) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11110555060605 + 11110555060606.

It is an arithmetic number, because the mean of its divisors is an integer number (11110555060606).

Almost surely, 2^{22221110121211} is an apocalyptic number.

22221110121211 is a deficient number, since it is larger than the sum of its proper divisors (1).

22221110121211 is an equidigital number, since it uses as much as digits as its factorization.

22221110121211 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 64, while the sum is 19.

Adding to 22221110121211 its reverse (11212101112222), we get a palindrome (33433211233433).

The spelling of 22221110121211 in words is "twenty-two trillion, two hundred twenty-one billion, one hundred ten million, one hundred twenty-one thousand, two hundred eleven".