12012200211220 has 96 divisors (see below), whose sum is σ = 27652664390400. Its totient is φ = 4346883701760.

The previous prime is 12012200211139. The next prime is 12012200211227. The reversal of 12012200211220 is 2211200221021.

It is a happy number.

It is a super-2 number, since 2×12012200211220² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 12012200211194 and 12012200211203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12012200211227) 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, 38464824 + ... + 38775856.

It is an arithmetic number, because the mean of its divisors is an integer number (288048587400).

Almost surely, 2^{12012200211220} is an apocalyptic number.

12012200211220 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 12012200211220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13826332195200).

12012200211220 is an abundant number, since it is smaller than the sum of its proper divisors (15640464179180).

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

12012200211220 is a wasteful number, since it uses less digits than its factorization.

12012200211220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 311905 (or 311903 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 12012200211220 its reverse (2211200221021), we get a palindrome (14223400432241).

The spelling of 12012200211220 in words is "twelve trillion, twelve billion, two hundred million, two hundred eleven thousand, two hundred twenty".