21112200110 has 24 divisors (see below), whose sum is σ = 38951475048. Its totient is φ = 8238900800.

The previous prime is 21112200107. The next prime is 21112200119. The reversal of 21112200110 is 1100221112.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 21112200091 and 21112200100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21112200119) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 611156 + ... + 644775.

It is an arithmetic number, because the mean of its divisors is an integer number (1622978127).

Almost surely, 2^21112200110 is an apocalyptic number.

21112200110 is a deficient number, since it is larger than the sum of its proper divisors (17839274938).

21112200110 is a wasteful number, since it uses less digits than its factorization.

21112200110 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1256020 (or 1255979 counting only the distinct ones).

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

Adding to 21112200110 its reverse (1100221112), we get a palindrome (22212421222).

The spelling of 21112200110 in words is "twenty-one billion, one hundred twelve million, two hundred thousand, one hundred ten".