12101320220 has 48 divisors (see below), whose sum is σ = 27791013600. Its totient is φ = 4389688320.

The previous prime is 12101320207. The next prime is 12101320243. The reversal of 12101320220 is 2202310121.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 12101320195 and 12101320204.

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, 22736 + ... + 157224.

It is an arithmetic number, because the mean of its divisors is an integer number (578979450).

Almost surely, 2^12101320220 is an apocalyptic number.

12101320220 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 12101320220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13895506800).

12101320220 is an abundant number, since it is smaller than the sum of its proper divisors (15689693380).

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

12101320220 is a wasteful number, since it uses less digits than its factorization.

12101320220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 134918 (or 134916 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 14.

Adding to 12101320220 its reverse (2202310121), we get a palindrome (14303630341).

The spelling of 12101320220 in words is "twelve billion, one hundred one million, three hundred twenty thousand, two hundred twenty".