21222110222122 has 16 divisors (see below), whose sum is σ = 32610307475592. Its totient is φ = 10352019214080.

The previous prime is 21222110222113. The next prime is 21222110222129. The reversal of 21222110222122 is 22122201122212.

It can be written as a sum of positive squares in 4 ways, for example, as 20957617046601 + 264493175521 = 4577949^2 + 514289^2 .

It is a junction number, because it is equal to n+sod(n) for n = 21222110222093 and 21222110222102.

It is not an unprimeable number, because it can be changed into a prime (21222110222129) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 877288 + ... + 6573724.

Almost surely, 2^{21222110222122} is an apocalyptic number.

21222110222122 is a deficient number, since it is larger than the sum of its proper divisors (11388197253470).

21222110222122 is a wasteful number, since it uses less digits than its factorization.

21222110222122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5741913.

The product of its (nonzero) digits is 512, while the sum is 22.

Adding to 21222110222122 its reverse (22122201122212), we get a palindrome (43344311344334).

The spelling of 21222110222122 in words is "twenty-one trillion, two hundred twenty-two billion, one hundred ten million, two hundred twenty-two thousand, one hundred twenty-two".