12212221320023 has 4 divisors (see below), whose sum is σ = 12217455879288. Its totient is φ = 12206986760760.

The previous prime is 12212221320001. The next prime is 12212221320043. The reversal of 12212221320023 is 32002312221221.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12212221320023 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12212221320043) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2617276133 + ... + 2617280798.

It is an arithmetic number, because the mean of its divisors is an integer number (3054363969822).

Almost surely, 2^{12212221320023} is an apocalyptic number.

12212221320023 is a deficient number, since it is larger than the sum of its proper divisors (5234559265).

12212221320023 is an equidigital number, since it uses as much as digits as its factorization.

12212221320023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5234559264.

The product of its (nonzero) digits is 1152, while the sum is 23.

Adding to 12212221320023 its reverse (32002312221221), we get a palindrome (44214533541244).

The spelling of 12212221320023 in words is "twelve trillion, two hundred twelve billion, two hundred twenty-one million, three hundred twenty thousand, twenty-three".