21112210220122 has 16 divisors (see below), whose sum is σ = 36196408501632. Its totient is φ = 9047078063280.

The previous prime is 21112210220099. The next prime is 21112210220131. The reversal of 21112210220122 is 22102201221112.

It is a self number, because there is not a number n which added to its sum of digits gives 21112210220122.

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, 84206278 + ... + 84456625.

It is an arithmetic number, because the mean of its divisors is an integer number (2262275531352).

Almost surely, 2^{21112210220122} is an apocalyptic number.

21112210220122 is a deficient number, since it is larger than the sum of its proper divisors (15084198281510).

21112210220122 is a wasteful number, since it uses less digits than its factorization.

21112210220122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 168671853.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 21112210220122 its reverse (22102201221112), we get a palindrome (43214411441234).

The spelling of 21112210220122 in words is "twenty-one trillion, one hundred twelve billion, two hundred ten million, two hundred twenty thousand, one hundred twenty-two".