22120111212 has 24 divisors (see below), whose sum is σ = 52235445696. Its totient is φ = 7284534288.

The previous prime is 22120111199. The next prime is 22120111219. The reversal of 22120111212 is 21211102122.

It is a junction number, because it is equal to n+sod(n) for n = 22120111191 and 22120111200.

It is not an unprimeable number, because it can be changed into a prime (22120111219) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11103478 + ... + 11105469.

It is an arithmetic number, because the mean of its divisors is an integer number (2176476904).

Almost surely, 2^22120111212 is an apocalyptic number.

It is an amenable number.

22120111212 is an abundant number, since it is smaller than the sum of its proper divisors (30115334484).

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

22120111212 is a wasteful number, since it uses less digits than its factorization.

22120111212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22209037 (or 22209035 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 22120111212 its reverse (21211102122), we get a palindrome (43331213334).

The spelling of 22120111212 in words is "twenty-two billion, one hundred twenty million, one hundred eleven thousand, two hundred twelve".