13023451221 has 8 divisors (see below), whose sum is σ = 18943201824. Its totient is φ = 7893000720.

The previous prime is 13023451213. The next prime is 13023451241. The reversal of 13023451221 is 12215432031.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 13023451221 - 2³ = 13023451213 is a prime.

It is a super-2 number, since 2×13023451221² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 13023451191 and 13023451200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13023451241) 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 7 ways as a sum of consecutive naturals, for example, 197324986 + ... + 197325051.

It is an arithmetic number, because the mean of its divisors is an integer number (2367900228).

Almost surely, 2^13023451221 is an apocalyptic number.

13023451221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

13023451221 is a deficient number, since it is larger than the sum of its proper divisors (5919750603).

13023451221 is a wasteful number, since it uses less digits than its factorization.

13023451221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 394650051.

The product of its (nonzero) digits is 1440, while the sum is 24.

Adding to 13023451221 its reverse (12215432031), we get a palindrome (25238883252).

The spelling of 13023451221 in words is "thirteen billion, twenty-three million, four hundred fifty-one thousand, two hundred twenty-one".