21111222211112 has 16 divisors (see below), whose sum is σ = 43182045432000. Its totient is φ = 9596010095920.

The previous prime is 21111222210997. The next prime is 21111222211117.

It is a happy number.

21111222211112 is nontrivially palindromic in base 10.

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

It is not an unprimeable number, because it can be changed into a prime (21111222211117) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 119950126112 + ... + 119950126287.

It is an arithmetic number, because the mean of its divisors is an integer number (2698877839500).

Almost surely, 2^{21111222211112} is an apocalyptic number.

21111222211112 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

21111222211112 is an abundant number, since it is smaller than the sum of its proper divisors (22070823220888).

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

21111222211112 is a wasteful number, since it uses less digits than its factorization.

21111222211112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 239900252416 (or 239900252412 counting only the distinct ones).

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

It can be divided in two parts, 2111122 and 2211112, that added together give a palindrome (4322234).

The spelling of 21111222211112 in words is "twenty-one trillion, one hundred eleven billion, two hundred twenty-two million, two hundred eleven thousand, one hundred twelve".