13454352221 has 4 divisors (see below), whose sum is σ = 13455950844. Its totient is φ = 13452753600.

The previous prime is 13454352199. The next prime is 13454352269. The reversal of 13454352221 is 12225345431.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 12225345431 = 13 ⋅940411187.

It can be written as a sum of positive squares in 2 ways, for example, as 10761780121 + 2692572100 = 103739^2 + 51890^2 .

It is a cyclic number.

It is not a de Polignac number, because 13454352221 - 2⁶ = 13454352157 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 (13454352281) 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, 786620 + ... + 803541.

It is an arithmetic number, because the mean of its divisors is an integer number (3363987711).

Almost surely, 2^13454352221 is an apocalyptic number.

It is an amenable number.

13454352221 is a deficient number, since it is larger than the sum of its proper divisors (1598623).

13454352221 is an equidigital number, since it uses as much as digits as its factorization.

13454352221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1598622.

The product of its digits is 28800, while the sum is 32.

Adding to 13454352221 its reverse (12225345431), we get a palindrome (25679697652).

The spelling of 13454352221 in words is "thirteen billion, four hundred fifty-four million, three hundred fifty-two thousand, two hundred twenty-one".