13113443421 has 12 divisors (see below), whose sum is σ = 20398689948. Its totient is φ = 8069811264.

The previous prime is 13113443407. The next prime is 13113443437. The reversal of 13113443421 is 12434431131.

13113443421 is a `hidden beast` number, since 1 + 311 + 3 + 4 + 4 + 342 + 1 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 3482180100 + 9631263321 = 59010^2 + 98139^2 .

It is not a de Polignac number, because 13113443421 - 2¹⁷ = 13113312349 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13113443401) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 56040240 + ... + 56040473.

It is an arithmetic number, because the mean of its divisors is an integer number (1699890829).

Almost surely, 2^13113443421 is an apocalyptic number.

It is an amenable number.

13113443421 is a deficient number, since it is larger than the sum of its proper divisors (7285246527).

13113443421 is a wasteful number, since it uses less digits than its factorization.

13113443421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 112080732 (or 112080729 counting only the distinct ones).

The product of its digits is 3456, while the sum is 27.

Adding to 13113443421 its reverse (12434431131), we get a palindrome (25547874552).

The spelling of 13113443421 in words is "thirteen billion, one hundred thirteen million, four hundred forty-three thousand, four hundred twenty-one".