21110110221122 has 32 divisors (see below), whose sum is σ = 34187692999152. Its totient is φ = 9718370648064.

The previous prime is 21110110221097. The next prime is 21110110221133. The reversal of 21110110221122 is 22112201101112.

It can be written as a sum of positive squares in 8 ways, for example, as 13417136769481 + 7692973451641 = 3662941^2 + 2773621^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 21110110221122.

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, 17988698 + ... + 19126250.

Almost surely, 2^{21110110221122} is an apocalyptic number.

21110110221122 is a deficient number, since it is larger than the sum of its proper divisors (13077582778030).

21110110221122 is a wasteful number, since it uses less digits than its factorization.

21110110221122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1139382.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 21110110221122 its reverse (22112201101112), we get a palindrome (43222311322234).

The spelling of 21110110221122 in words is "twenty-one trillion, one hundred ten billion, one hundred ten million, two hundred twenty-one thousand, one hundred twenty-two".