12001223120020 has 24 divisors (see below), whose sum is σ = 25202653991424. Its totient is φ = 4800472973856.

The previous prime is 12001223119973. The next prime is 12001223120053. The reversal of 12001223120020 is 2002132210021.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 12001223119976 and 12001223120003.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6321189 + ... + 7997491.

It is an arithmetic number, because the mean of its divisors is an integer number (1050110582976).

Almost surely, 2^{12001223120020} is an apocalyptic number.

12001223120020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12001223120020 is an abundant number, since it is smaller than the sum of its proper divisors (13201430871404).

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

12001223120020 is a wasteful number, since it uses less digits than its factorization.

12001223120020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2034279 (or 2034277 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 16.

Adding to 12001223120020 its reverse (2002132210021), we get a palindrome (14003355330041).

Subtracting from 12001223120020 its reverse (2002132210021), we obtain a palindrome (9999090909999).

The spelling of 12001223120020 in words is "twelve trillion, one billion, two hundred twenty-three million, one hundred twenty thousand, twenty".