21102220110122 has 16 divisors (see below), whose sum is σ = 32816476044360. Its totient is φ = 10164987022848.

The previous prime is 21102220110109. The next prime is 21102220110137. The reversal of 21102220110122 is 22101102220112.

It can be written as a sum of positive squares in 4 ways, for example, as 20572674275521 + 529545834601 = 4535711^2 + 727699^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 21102220110122.

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, 398038463 + ... + 398091474.

Almost surely, 2^{21102220110122} is an apocalyptic number.

21102220110122 is a deficient number, since it is larger than the sum of its proper divisors (11714255934238).

21102220110122 is a wasteful number, since it uses less digits than its factorization.

21102220110122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 796130425.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 21102220110122 its reverse (22101102220112), we get a palindrome (43203322330234).

The spelling of 21102220110122 in words is "twenty-one trillion, one hundred two billion, two hundred twenty million, one hundred ten thousand, one hundred twenty-two".