21220110110 has 16 divisors (see below), whose sum is σ = 38201684400. Its totient is φ = 8486824896.

The previous prime is 21220110103. The next prime is 21220110113. The reversal of 21220110110 is 1101102212.

It is a junction number, because it is equal to n+sod(n) for n = 21220110091 and 21220110100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21220110113) 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, 77540 + ... + 220119.

It is an arithmetic number, because the mean of its divisors is an integer number (2387605275).

Almost surely, 2^21220110110 is an apocalyptic number.

21220110110 is a deficient number, since it is larger than the sum of its proper divisors (16981574290).

21220110110 is a wasteful number, since it uses less digits than its factorization.

21220110110 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 304795.

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

Adding to 21220110110 its reverse (1101102212), we get a palindrome (22321212322).

The spelling of 21220110110 in words is "twenty-one billion, two hundred twenty million, one hundred ten thousand, one hundred ten".