12312223303220 has 48 divisors (see below), whose sum is σ = 26220872216448. Its totient is φ = 4855332289920.

The previous prime is 12312223303213. The next prime is 12312223303267. The reversal of 12312223303220 is 2230332221321.

It is a self number, because there is not a number n which added to its sum of digits gives 12312223303220.

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, 38788274 + ... + 39104406.

It is an arithmetic number, because the mean of its divisors is an integer number (546268171176).

Almost surely, 2^{12312223303220} is an apocalyptic number.

12312223303220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12312223303220 is an abundant number, since it is smaller than the sum of its proper divisors (13908648913228).

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

12312223303220 is a wasteful number, since it uses less digits than its factorization.

12312223303220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 343640 (or 343638 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 26.

Adding to 12312223303220 its reverse (2230332221321), we get a palindrome (14542555524541).

The spelling of 12312223303220 in words is "twelve trillion, three hundred twelve billion, two hundred twenty-three million, three hundred three thousand, two hundred twenty".