12203112213221 has 4 divisors (see below), whose sum is σ = 12733682309472. Its totient is φ = 11672542116972.

The previous prime is 12203112213203. The next prime is 12203112213277. The reversal of 12203112213221 is 12231221130221.

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 a de Polignac number, because none of the positive numbers 2^k-12203112213221 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (23), and also a Moran number because the ratio is a prime number: 530570096227 = 12203112213221 / (1 + 2 + 2 + 0 + 3 + 1 + 1 + 2 + 2 + 1 + 3 + 2 + 2 + 1).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12203112213121) 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, 265285048091 + ... + 265285048136.

It is an arithmetic number, because the mean of its divisors is an integer number (3183420577368).

Almost surely, 2^{12203112213221} is an apocalyptic number.

It is an amenable number.

12203112213221 is a deficient number, since it is larger than the sum of its proper divisors (530570096251).

12203112213221 is an equidigital number, since it uses as much as digits as its factorization.

12203112213221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 530570096250.

The product of its (nonzero) digits is 576, while the sum is 23.

Adding to 12203112213221 its reverse (12231221130221), we get a palindrome (24434333343442).

The spelling of 12203112213221 in words is "twelve trillion, two hundred three billion, one hundred twelve million, two hundred thirteen thousand, two hundred twenty-one".