12320312132221 has 4 divisors (see below), whose sum is σ = 12320332939744. Its totient is φ = 12320291324700.

The previous prime is 12320312132197. The next prime is 12320312132243. The reversal of 12320312132221 is 12223121302321.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 12320312132221 - 2⁹ = 12320312131709 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 (12320312112221) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9488775 + ... + 10708756.

It is an arithmetic number, because the mean of its divisors is an integer number (3080083234936).

Almost surely, 2^{12320312132221} is an apocalyptic number.

It is an amenable number.

12320312132221 is a deficient number, since it is larger than the sum of its proper divisors (20807523).

12320312132221 is an equidigital number, since it uses as much as digits as its factorization.

12320312132221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20807522.

The product of its (nonzero) digits is 1728, while the sum is 25.

Adding to 12320312132221 its reverse (12223121302321), we get a palindrome (24543433434542).

The spelling of 12320312132221 in words is "twelve trillion, three hundred twenty billion, three hundred twelve million, one hundred thirty-two thousand, two hundred twenty-one".