21220112110 has 64 divisors (see below), whose sum is σ = 40896503424. Its totient is φ = 7907891200.

The previous prime is 21220112099. The next prime is 21220112117. The reversal of 21220112110 is 1121102212.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21220112117) 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 31 ways as a sum of consecutive naturals, for example, 7174752 + ... + 7177708.

It is an arithmetic number, because the mean of its divisors is an integer number (639007866).

Almost surely, 2^21220112110 is an apocalyptic number.

21220112110 is a deficient number, since it is larger than the sum of its proper divisors (19676391314).

21220112110 is a wasteful number, since it uses less digits than its factorization.

21220112110 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3789.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 21220112110 its reverse (1121102212), we get a palindrome (22341214322).

The spelling of 21220112110 in words is "twenty-one billion, two hundred twenty million, one hundred twelve thousand, one hundred ten".