13012022321 has 4 divisors (see below), whose sum is σ = 13012904052. Its totient is φ = 13011140592.

The previous prime is 13012022279. The next prime is 13012022327. The reversal of 13012022321 is 12322021031.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 8375910400 + 4636111921 = 91520^2 + 68089^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13012022321 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 13012022321.

It is not an unprimeable number, because it can be changed into a prime (13012022327) 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, 418346 + ... + 448371.

It is an arithmetic number, because the mean of its divisors is an integer number (3253226013).

Almost surely, 2^13012022321 is an apocalyptic number.

It is an amenable number.

13012022321 is a deficient number, since it is larger than the sum of its proper divisors (881731).

13012022321 is an equidigital number, since it uses as much as digits as its factorization.

13012022321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 881730.

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

Adding to 13012022321 its reverse (12322021031), we get a palindrome (25334043352).

The spelling of 13012022321 in words is "thirteen billion, twelve million, twenty-two thousand, three hundred twenty-one".