21101110122 has 16 divisors (see below), whose sum is σ = 42205185792. Its totient is φ = 7033209120.

The previous prime is 21101110099. The next prime is 21101110207. The reversal of 21101110122 is 22101110112.

21101110122 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 21101110098 and 21101110107.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25018 + ... + 206949.

It is an arithmetic number, because the mean of its divisors is an integer number (2637824112).

Almost surely, 2^21101110122 is an apocalyptic number.

21101110122 is an abundant number, since it is smaller than the sum of its proper divisors (21104075670).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21101110122 is a wasteful number, since it uses less digits than its factorization.

21101110122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 247133.

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 21101110122 its reverse (22101110112), we get a palindrome (43202220234).

The spelling of 21101110122 in words is "twenty-one billion, one hundred one million, one hundred ten thousand, one hundred twenty-two".