13381421243 has 4 divisors (see below), whose sum is σ = 13388077368. Its totient is φ = 13374765120.

The previous prime is 13381421239. The next prime is 13381421279. The reversal of 13381421243 is 34212418331.

13381421243 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 is a cyclic number.

It is not a de Polignac number, because 13381421243 - 2² = 13381421239 is a prime.

It is a super-2 number, since 2×13381421243² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13381421743) 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, 3325046 + ... + 3329067.

It is an arithmetic number, because the mean of its divisors is an integer number (3347019342).

Almost surely, 2^13381421243 is an apocalyptic number.

13381421243 is a deficient number, since it is larger than the sum of its proper divisors (6656125).

13381421243 is an equidigital number, since it uses as much as digits as its factorization.

13381421243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6656124.

The product of its digits is 13824, while the sum is 32.

Adding to 13381421243 its reverse (34212418331), we get a palindrome (47593839574).

The spelling of 13381421243 in words is "thirteen billion, three hundred eighty-one million, four hundred twenty-one thousand, two hundred forty-three".