21220311110 has 32 divisors (see below), whose sum is σ = 38976850080. Its totient is φ = 8315711488.

The previous prime is 21220311109. The next prime is 21220311127. The reversal of 21220311110 is 1111302212.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 111494 + ... + 234246.

It is an arithmetic number, because the mean of its divisors is an integer number (1218026565).

Almost surely, 2^21220311110 is an apocalyptic number.

21220311110 is a deficient number, since it is larger than the sum of its proper divisors (17756538970).

21220311110 is a wasteful number, since it uses less digits than its factorization.

21220311110 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 123112.

The product of its (nonzero) digits is 24, while the sum is 14.

Adding to 21220311110 its reverse (1111302212), we get a palindrome (22331613322).

The spelling of 21220311110 in words is "twenty-one billion, two hundred twenty million, three hundred eleven thousand, one hundred ten".