21101110022 has 32 divisors (see below), whose sum is σ = 35365805280. Its totient is φ = 9383731200.

The previous prime is 21101110021. The next prime is 21101110081. The reversal of 21101110022 is 22001110112.

It is a junction number, because it is equal to n+sod(n) for n = 21101109985 and 21101110012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21101110021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 218318 + ... + 299774.

It is an arithmetic number, because the mean of its divisors is an integer number (1105181415).

Almost surely, 2^21101110022 is an apocalyptic number.

21101110022 is a deficient number, since it is larger than the sum of its proper divisors (14264695258).

21101110022 is a wasteful number, since it uses less digits than its factorization.

21101110022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81896.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 21101110022 its reverse (22001110112), we get a palindrome (43102220134).

The spelling of 21101110022 in words is "twenty-one billion, one hundred one million, one hundred ten thousand, twenty-two".