13023120221 has 4 divisors (see below), whose sum is σ = 13032247872. Its totient is φ = 13013992572.

The previous prime is 13023120199. The next prime is 13023120233. The reversal of 13023120221 is 12202132031.

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-13023120221 is a prime.

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 13023120221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13023125221) 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, 4561685 + ... + 4564538.

It is an arithmetic number, because the mean of its divisors is an integer number (3258061968).

Almost surely, 2^13023120221 is an apocalyptic number.

It is an amenable number.

13023120221 is a deficient number, since it is larger than the sum of its proper divisors (9127651).

13023120221 is an equidigital number, since it uses as much as digits as its factorization.

13023120221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9127650.

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 13023120221 its reverse (12202132031), we get a palindrome (25225252252).

The spelling of 13023120221 in words is "thirteen billion, twenty-three million, one hundred twenty thousand, two hundred twenty-one".