11553341321 has 4 divisors (see below), whose sum is σ = 12232949652. Its totient is φ = 10873732992.

The previous prime is 11553341297. The next prime is 11553341329. The reversal of 11553341321 is 12314335511.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 12314335511 = 29 ⋅424632259.

It can be written as a sum of positive squares in 2 ways, for example, as 3495765625 + 8057575696 = 59125^2 + 89764^2 .

It is a cyclic number.

It is not a de Polignac number, because 11553341321 - 2¹⁸ = 11553079177 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11553341329) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 339804140 + ... + 339804173.

It is an arithmetic number, because the mean of its divisors is an integer number (3058237413).

Almost surely, 2^11553341321 is an apocalyptic number.

It is an amenable number.

11553341321 is a deficient number, since it is larger than the sum of its proper divisors (679608331).

11553341321 is an equidigital number, since it uses as much as digits as its factorization.

11553341321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 679608330.

The product of its digits is 5400, while the sum is 29.

Adding to 11553341321 its reverse (12314335511), we get a palindrome (23867676832).

The spelling of 11553341321 in words is "eleven billion, five hundred fifty-three million, three hundred forty-one thousand, three hundred twenty-one".