12101212220 has 96 divisors (see below), whose sum is σ = 26983756800. Its totient is φ = 4550724864.

The previous prime is 12101212219. The next prime is 12101212223. The reversal of 12101212220 is 2221210121.

It is a junction number, because it is equal to n+sod(n) for n = 12101212195 and 12101212204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12101212223) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 11646461 + ... + 11647499.

It is an arithmetic number, because the mean of its divisors is an integer number (281080800).

Almost surely, 2^12101212220 is an apocalyptic number.

12101212220 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 12101212220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13491878400).

12101212220 is an abundant number, since it is smaller than the sum of its proper divisors (14882544580).

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

12101212220 is a wasteful number, since it uses less digits than its factorization.

12101212220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1587 (or 1585 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 12101212220 its reverse (2221210121), we get a palindrome (14322422341).

The spelling of 12101212220 in words is "twelve billion, one hundred one million, two hundred twelve thousand, two hundred twenty".