12212321120345 has 16 divisors (see below), whose sum is σ = 14996625887232. Its totient is φ = 9541994461440.

The previous prime is 12212321120341. The next prime is 12212321120347. The reversal of 12212321120345 is 54302112321221.

It is not a de Polignac number, because 12212321120345 - 2² = 12212321120341 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12212321120341) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1190609 + ... + 5083521.

It is an arithmetic number, because the mean of its divisors is an integer number (937289117952).

Almost surely, 2^{12212321120345} is an apocalyptic number.

It is an amenable number.

12212321120345 is a deficient number, since it is larger than the sum of its proper divisors (2784304766887).

12212321120345 is a wasteful number, since it uses less digits than its factorization.

12212321120345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3907552.

The product of its (nonzero) digits is 5760, while the sum is 29.

Adding to 12212321120345 its reverse (54302112321221), we get a palindrome (66514433441566).

The spelling of 12212321120345 in words is "twelve trillion, two hundred twelve billion, three hundred twenty-one million, one hundred twenty thousand, three hundred forty-five".