21112111121222 has 48 divisors (see below), whose sum is σ = 35540936428032. Its totient is φ = 9327803400000.

The previous prime is 21112111121201. The next prime is 21112111121293. The reversal of 21112111121222 is 22212111121112.

It is a happy number.

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

It is a junction number, because it is equal to n+sod(n) for n = 21112111121194 and 21112111121203.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8968847 + ... + 11075397.

It is an arithmetic number, because the mean of its divisors is an integer number (740436175584).

Almost surely, 2^{21112111121222} is an apocalyptic number.

21112111121222 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

21112111121222 is a deficient number, since it is larger than the sum of its proper divisors (14428825306810).

21112111121222 is a wasteful number, since it uses less digits than its factorization.

21112111121222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2106917 (or 2106876 counting only the distinct ones).

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

Adding to 21112111121222 its reverse (22212111121112), we get a palindrome (43324222242334).

The spelling of 21112111121222 in words is "twenty-one trillion, one hundred twelve billion, one hundred eleven million, one hundred twenty-one thousand, two hundred twenty-two".