21222011122 has 16 divisors (see below), whose sum is σ = 34621137432. Its totient is φ = 9697795200.

The previous prime is 21222011119. The next prime is 21222011141. The reversal of 21222011122 is 22111022212.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 21164721361 + 57289761 = 145481^2 + 7569^2 .

It is a junction number, because it is equal to n+sod(n) for n = 21222011096 and 21222011105.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4038123 + ... + 4043374.

Almost surely, 2^21222011122 is an apocalyptic number.

21222011122 is a deficient number, since it is larger than the sum of its proper divisors (13399126310).

21222011122 is a wasteful number, since it uses less digits than its factorization.

21222011122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8081613.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 21222011122 its reverse (22111022212), we get a palindrome (43333033334).

The spelling of 21222011122 in words is "twenty-one billion, two hundred twenty-two million, eleven thousand, one hundred twenty-two".