12101101220 has 48 divisors (see below), whose sum is σ = 27444841200. Its totient is φ = 4455407616.

The previous prime is 12101101219. The next prime is 12101101223. The reversal of 12101101220 is 2210110121.

It can be written as a sum of positive squares in 8 ways, for example, as 4564083364 + 7537017856 = 67558^2 + 86816^2 .

It is not an unprimeable number, because it can be changed into a prime (12101101223) by changing a digit.

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, 25856 + ... + 157704.

It is an arithmetic number, because the mean of its divisors is an integer number (571767525).

Almost surely, 2^12101101220 is an apocalyptic number.

12101101220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12101101220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13722420600).

12101101220 is an abundant number, since it is smaller than the sum of its proper divisors (15343739980).

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

12101101220 is a wasteful number, since it uses less digits than its factorization.

12101101220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 132224 (or 132222 counting only the distinct ones).

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

Adding to 12101101220 its reverse (2210110121), we get a palindrome (14311211341).

The spelling of 12101101220 in words is "twelve billion, one hundred one million, one hundred one thousand, two hundred twenty".