12001223023220 has 48 divisors (see below), whose sum is σ = 25470517927680. Its totient is φ = 4749686941056.

The previous prime is 12001223023219. The next prime is 12001223023271. The reversal of 12001223023220 is 2232032210021.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 12001223023192 and 12001223023201.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6552332 + ... + 8181411.

It is an arithmetic number, because the mean of its divisors is an integer number (530635790160).

Almost surely, 2^{12001223023220} is an apocalyptic number.

12001223023220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12001223023220 is an abundant number, since it is smaller than the sum of its proper divisors (13469294904460).

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

12001223023220 is a wasteful number, since it uses less digits than its factorization.

12001223023220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14734184 (or 14734182 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 20.

Adding to 12001223023220 its reverse (2232032210021), we get a palindrome (14233255233241).

The spelling of 12001223023220 in words is "twelve trillion, one billion, two hundred twenty-three million, twenty-three thousand, two hundred twenty".