21220122111110 has 16 divisors (see below), whose sum is σ = 41134390554096. Its totient is φ = 7835122010208.

The previous prime is 21220122111109. The next prime is 21220122111119. The reversal of 21220122111110 is 1111122102212.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21220122111119) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 81615854144 + ... + 81615854403.

It is an arithmetic number, because the mean of its divisors is an integer number (2570899409631).

Almost surely, 2^{21220122111110} is an apocalyptic number.

21220122111110 is a deficient number, since it is larger than the sum of its proper divisors (19914268442986).

21220122111110 is a wasteful number, since it uses less digits than its factorization.

21220122111110 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 163231708567.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 21220122111110 its reverse (1111122102212), we get a palindrome (22331244213322).

The spelling of 21220122111110 in words is "twenty-one trillion, two hundred twenty billion, one hundred twenty-two million, one hundred eleven thousand, one hundred ten".