13256223321 has 16 divisors (see below), whose sum is σ = 19946669760. Its totient is φ = 7757037120.

The previous prime is 13256223311. The next prime is 13256223353. The reversal of 13256223321 is 12332265231.

It is not a de Polignac number, because 13256223321 - 2⁵ = 13256223289 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (13256223301) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6924970 + ... + 6926883.

It is an arithmetic number, because the mean of its divisors is an integer number (1246666860).

Almost surely, 2^13256223321 is an apocalyptic number.

13256223321 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

13256223321 is a deficient number, since it is larger than the sum of its proper divisors (6690446439).

13256223321 is a wasteful number, since it uses less digits than its factorization.

13256223321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13851896.

The product of its digits is 12960, while the sum is 30.

Adding to 13256223321 its reverse (12332265231), we get a palindrome (25588488552).

The spelling of 13256223321 in words is "thirteen billion, two hundred fifty-six million, two hundred twenty-three thousand, three hundred twenty-one".