21210112221110 has 32 divisors (see below), whose sum is σ = 38211941950560. Its totient is φ = 8476548097792.

The previous prime is 21210112221059. The next prime is 21210112221149. The reversal of 21210112221110 is 1112221101212.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 203310482 + ... + 203414778.

It is an arithmetic number, because the mean of its divisors is an integer number (1194123185955).

Almost surely, 2^{21210112221110} is an apocalyptic number.

21210112221110 is a deficient number, since it is larger than the sum of its proper divisors (17001829729450).

21210112221110 is a wasteful number, since it uses less digits than its factorization.

21210112221110 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 122080.

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

Adding to 21210112221110 its reverse (1112221101212), we get a palindrome (22322333322322).

The spelling of 21210112221110 in words is "twenty-one trillion, two hundred ten billion, one hundred twelve million, two hundred twenty-one thousand, one hundred ten".