13021221223 has 4 divisors (see below), whose sum is σ = 13234683928. Its totient is φ = 12807758520.

The previous prime is 13021221221. The next prime is 13021221229. The reversal of 13021221223 is 32212212031.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 32212212031 = 40163 ⋅802037.

It is a cyclic number.

It is not a de Polignac number, because 13021221223 - 2¹ = 13021221221 is a prime.

It is a super-3 number, since 3×13021221223³ (a number of 31 digits) contains 333 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 13021221223.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13021221221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 106731261 + ... + 106731382.

It is an arithmetic number, because the mean of its divisors is an integer number (3308670982).

Almost surely, 2^13021221223 is an apocalyptic number.

13021221223 is a deficient number, since it is larger than the sum of its proper divisors (213462705).

13021221223 is an equidigital number, since it uses as much as digits as its factorization.

13021221223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 213462704.

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 13021221223 its reverse (32212212031), we get a palindrome (45233433254).

The spelling of 13021221223 in words is "thirteen billion, twenty-one million, two hundred twenty-one thousand, two hundred twenty-three".