12012103220 has 24 divisors (see below), whose sum is σ = 27165834024. Its totient is φ = 4435238016.

The previous prime is 12012103199. The next prime is 12012103223. The reversal of 12012103220 is 2230121021.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 8271376 + 12003831844 = 2876^2 + 109562^2 .

It is a junction number, because it is equal to n+sod(n) for n = 12012103195 and 12012103204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12012103223) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23099939 + ... + 23100458.

It is an arithmetic number, because the mean of its divisors is an integer number (1131909751).

Almost surely, 2^12012103220 is an apocalyptic number.

12012103220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12012103220 is an abundant number, since it is smaller than the sum of its proper divisors (15153730804).

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

12012103220 is a wasteful number, since it uses less digits than its factorization.

12012103220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46200419 (or 46200417 counting only the distinct ones).

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

Adding to 12012103220 its reverse (2230121021), we get a palindrome (14242224241).

The spelling of 12012103220 in words is "twelve billion, twelve million, one hundred three thousand, two hundred twenty".