13211223221 has 8 divisors (see below), whose sum is σ = 15585590784. Its totient is φ = 10958618160.

The previous prime is 13211223131. The next prime is 13211223227. The reversal of 13211223221 is 12232211231.

13211223221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 13211223221 - 2¹⁸ = 13210961077 is a prime.

It is a super-2 number, since 2×13211223221² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13211223193 and 13211223202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13211223227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30440390 + ... + 30440823.

It is an arithmetic number, because the mean of its divisors is an integer number (1948198848).

Almost surely, 2^13211223221 is an apocalyptic number.

It is an amenable number.

13211223221 is a deficient number, since it is larger than the sum of its proper divisors (2374367563).

13211223221 is an equidigital number, since it uses as much as digits as its factorization.

13211223221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60881251.

The product of its digits is 288, while the sum is 20.

Adding to 13211223221 its reverse (12232211231), we get a palindrome (25443434452).

The spelling of 13211223221 in words is "thirteen billion, two hundred eleven million, two hundred twenty-three thousand, two hundred twenty-one".