13100012221 has 4 divisors (see below), whose sum is σ = 13404663712. Its totient is φ = 12795360732.

The previous prime is 13100012207. The next prime is 13100012243. The reversal of 13100012221 is 12221000131.

13100012221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 12221000131 = 3163 ⋅3863737.

It is a cyclic number.

It is not a de Polignac number, because 13100012221 - 2⁹ = 13100011709 is a prime.

It is a super-2 number, since 2×13100012221² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13100012021) 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 3 ways as a sum of consecutive naturals, for example, 152325681 + ... + 152325766.

It is an arithmetic number, because the mean of its divisors is an integer number (3351165928).

Almost surely, 2^13100012221 is an apocalyptic number.

It is an amenable number.

13100012221 is a deficient number, since it is larger than the sum of its proper divisors (304651491).

13100012221 is an equidigital number, since it uses as much as digits as its factorization.

13100012221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 304651490.

The product of its (nonzero) digits is 24, while the sum is 13.

Adding to 13100012221 its reverse (12221000131), we get a palindrome (25321012352).

The spelling of 13100012221 in words is "thirteen billion, one hundred million, twelve thousand, two hundred twenty-one".