13220221213 has 8 divisors (see below), whose sum is σ = 13678143480. Its totient is φ = 12762435840.

The previous prime is 13220221181. The next prime is 13220221253. The reversal of 13220221213 is 31212202231.

It can be written as a sum of positive squares in 4 ways, for example, as 2063158084 + 11157063129 = 45422^2 + 105627^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 13220221213 - 2⁵ = 13220221181 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13220221253) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 186481 + ... + 247417.

It is an arithmetic number, because the mean of its divisors is an integer number (1709767935).

Almost surely, 2^13220221213 is an apocalyptic number.

It is an amenable number.

13220221213 is a deficient number, since it is larger than the sum of its proper divisors (457922267).

13220221213 is an equidigital number, since it uses as much as digits as its factorization.

13220221213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68447.

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 13220221213 its reverse (31212202231), we get a palindrome (44432423444).

The spelling of 13220221213 in words is "thirteen billion, two hundred twenty million, two hundred twenty-one thousand, two hundred thirteen".