21112221101222 has 32 divisors (see below), whose sum is σ = 32705853373440. Its totient is φ = 10210604009760.

The previous prime is 21112221101207. The next prime is 21112221101243. The reversal of 21112221101222 is 22210112221112.

It is a junction number, because it is equal to n+sod(n) for n = 21112221101194 and 21112221101203.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1394550929 + ... + 1394566067.

It is an arithmetic number, because the mean of its divisors is an integer number (1022057917920).

Almost surely, 2^{21112221101222} is an apocalyptic number.

21112221101222 is a deficient number, since it is larger than the sum of its proper divisors (11593632272218).

21112221101222 is a wasteful number, since it uses less digits than its factorization.

21112221101222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24668.

The product of its (nonzero) digits is 128, while the sum is 20.

Adding to 21112221101222 its reverse (22210112221112), we get a palindrome (43322333322334).

The spelling of 21112221101222 in words is "twenty-one trillion, one hundred twelve billion, two hundred twenty-one million, one hundred one thousand, two hundred twenty-two".