22111212121112 has 32 divisors (see below), whose sum is σ = 45805835858400. Its totient is φ = 9952872973824.

The previous prime is 22111212121111. The next prime is 22111212121147. The reversal of 22111212121112 is 21112121211122.

It is a happy number.

It is a super-2 number, since 2×22111212121112² (a number of 27 digits) contains 22 as substring.

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22111212121111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3534397787 + ... + 3534404042.

It is an arithmetic number, because the mean of its divisors is an integer number (1431432370575).

Almost surely, 2^{22111212121112} is an apocalyptic number.

It is an amenable number.

22111212121112 is an abundant number, since it is smaller than the sum of its proper divisors (23694623737288).

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

22111212121112 is a wasteful number, since it uses less digits than its factorization.

22111212121112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7068801875 (or 7068801871 counting only the distinct ones).

The product of its digits is 64, while the sum is 20.

Adding to 22111212121112 its reverse (21112121211122), we get a palindrome (43223333332234).

It can be divided in two parts, 2 and 2111212121112, that multiplied together give a palindrome (4222424242224).

The spelling of 22111212121112 in words is "twenty-two trillion, one hundred eleven billion, two hundred twelve million, one hundred twenty-one thousand, one hundred twelve".