12100220000 has 120 divisors (see below), whose sum is σ = 32475160872. Its totient is φ = 4400000000.

The previous prime is 12100219981. The next prime is 12100220017. The reversal of 12100220000 is 2200121.

Added to its reverse (2200121) it gives a square (12102420121 = 110011²).

It is a Cunningham number, because it is equal to 110001²-1.

It is a Harshad number since it is a multiple of its sum of digits (8).

It is a self number, because there is not a number n which added to its sum of digits gives 12100220000.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 192500 + ... + 247500.

Almost surely, 2^12100220000 is an apocalyptic number.

12100220000 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 12100220000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16237580436).

12100220000 is an abundant number, since it is smaller than the sum of its proper divisors (20374940872).

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

12100220000 is an equidigital number, since it uses as much as digits as its factorization.

12100220000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55042 (or 55019 counting only the distinct ones).

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

Adding to 12100220000 its reverse (2200121), we get a palindrome (12102420121).

The spelling of 12100220000 in words is "twelve billion, one hundred million, two hundred twenty thousand".