21222111122110 has 16 divisors (see below), whose sum is σ = 39860660890656. Its totient is φ = 8119764255328.

The previous prime is 21222111122057. The next prime is 21222111122129. The reversal of 21222111122110 is 1122111122212.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 46135023949 + ... + 46135024408.

It is an arithmetic number, because the mean of its divisors is an integer number (2491291305666).

Almost surely, 2^{21222111122110} is an apocalyptic number.

21222111122110 is a deficient number, since it is larger than the sum of its proper divisors (18638549768546).

21222111122110 is a wasteful number, since it uses less digits than its factorization.

21222111122110 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 92270048387.

The product of its (nonzero) digits is 64, while the sum is 19.

Adding to 21222111122110 its reverse (1122111122212), we get a palindrome (22344222244322).

The spelling of 21222111122110 in words is "twenty-one trillion, two hundred twenty-two billion, one hundred eleven million, one hundred twenty-two thousand, one hundred ten".