13021121211223 has 4 divisors (see below), whose sum is σ = 13021128434160. Its totient is φ = 13021113988288.

The previous prime is 13021121211221. The next prime is 13021121211331. The reversal of 13021121211223 is 32211212112031.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 13021121211223 - 2¹ = 13021121211221 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13021121211194 and 13021121211203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13021121211221) 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, 1585383 + ... + 5343751.

It is an arithmetic number, because the mean of its divisors is an integer number (3255282108540).

Almost surely, 2^{13021121211223} is an apocalyptic number.

13021121211223 is a deficient number, since it is larger than the sum of its proper divisors (7222937).

13021121211223 is an equidigital number, since it uses as much as digits as its factorization.

13021121211223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7222936.

The product of its (nonzero) digits is 288, while the sum is 22.

Adding to 13021121211223 its reverse (32211212112031), we get a palindrome (45232333323254).

The spelling of 13021121211223 in words is "thirteen trillion, twenty-one billion, one hundred twenty-one million, two hundred eleven thousand, two hundred twenty-three".