12221101110 has 64 divisors (see below), whose sum is σ = 30200329152. Its totient is φ = 3162779136.

The previous prime is 12221101043. The next prime is 12221101133. The reversal of 12221101110 is 1110112221.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 426804 + ... + 454536.

It is an arithmetic number, because the mean of its divisors is an integer number (471880143).

Almost surely, 2^12221101110 is an apocalyptic number.

12221101110 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 12221101110, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15100164576).

12221101110 is an abundant number, since it is smaller than the sum of its proper divisors (17979228042).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12221101110 is a wasteful number, since it uses less digits than its factorization.

12221101110 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28177.

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 12221101110 its reverse (1110112221), we get a palindrome (13331213331).

It can be divided in two parts, 12 and 221101110, that added together give a palindrome (221101122).

The spelling of 12221101110 in words is "twelve billion, two hundred twenty-one million, one hundred one thousand, one hundred ten".