13450012221 has 4 divisors (see below), whose sum is σ = 17933349632. Its totient is φ = 8966674812.

The previous prime is 13450012193. The next prime is 13450012223. The reversal of 13450012221 is 12221005431.

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.

It is not a de Polignac number, because 13450012221 - 2⁵ = 13450012189 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13450012223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2241668701 + ... + 2241668706.

It is an arithmetic number, because the mean of its divisors is an integer number (4483337408).

Almost surely, 2^13450012221 is an apocalyptic number.

It is an amenable number.

13450012221 is a deficient number, since it is larger than the sum of its proper divisors (4483337411).

13450012221 is an equidigital number, since it uses as much as digits as its factorization.

13450012221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4483337410.

The product of its (nonzero) digits is 480, while the sum is 21.

Adding to 13450012221 its reverse (12221005431), we get a palindrome (25671017652).

The spelling of 13450012221 in words is "thirteen billion, four hundred fifty million, twelve thousand, two hundred twenty-one".