13111003621 has 4 divisors (see below), whose sum is σ = 13111782700. Its totient is φ = 13110224544.

The previous prime is 13111003571. The next prime is 13111003627. The reversal of 13111003621 is 12630011131.

13111003621 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.

It can be written as a sum of positive squares in 2 ways, for example, as 4540872996 + 8570130625 = 67386^2 + 92575^2 .

It is a cyclic number.

It is not a de Polignac number, because 13111003621 - 2¹¹ = 13111001573 is a prime.

It is a super-2 number, since 2×13111003621² (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 (13111003627) 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, 363726 + ... + 398143.

It is an arithmetic number, because the mean of its divisors is an integer number (3277945675).

Almost surely, 2^13111003621 is an apocalyptic number.

It is an amenable number.

13111003621 is a deficient number, since it is larger than the sum of its proper divisors (779079).

13111003621 is an equidigital number, since it uses as much as digits as its factorization.

13111003621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 779078.

The product of its (nonzero) digits is 108, while the sum is 19.

Adding to 13111003621 its reverse (12630011131), we get a palindrome (25741014752).

The spelling of 13111003621 in words is "thirteen billion, one hundred eleven million, three thousand, six hundred twenty-one".