22111212110121 has 24 divisors (see below), whose sum is σ = 32612250850920. Its totient is φ = 14432755931136.

The previous prime is 22111212110083. The next prime is 22111212110131. The reversal of 22111212110121 is 12101121211122.

It is a happy number.

22111212110121 is a `hidden beast` number, since 2 + 211 + 121 + 211 + 0 + 121 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 7464976948521 + 14646235161600 = 2732211^2 + 3827040^2 .

It is not a de Polignac number, because 22111212110121 - 2⁷ = 22111212109993 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 22111212110094 and 22111212110103.

It is not an unprimeable number, because it can be changed into a prime (22111212110131) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 122737776 + ... + 122917793.

It is an arithmetic number, because the mean of its divisors is an integer number (1358843785455).

Almost surely, 2^{22111212110121} is an apocalyptic number.

It is an amenable number.

22111212110121 is a deficient number, since it is larger than the sum of its proper divisors (10501038740799).

22111212110121 is a wasteful number, since it uses less digits than its factorization.

22111212110121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 245655785 (or 245655782 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 18.

Adding to 22111212110121 its reverse (12101121211122), we get a palindrome (34212333321243).

The spelling of 22111212110121 in words is "twenty-two trillion, one hundred eleven billion, two hundred twelve million, one hundred ten thousand, one hundred twenty-one".