13131402421 has 4 divisors (see below), whose sum is σ = 13161870144. Its totient is φ = 13100934700.

The previous prime is 13131402331. The next prime is 13131402433. The reversal of 13131402421 is 12420413131.

13131402421 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, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 13131402421 - 2⁹ = 13131401909 is a prime.

It is a super-2 number, since 2×13131402421² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13131402392 and 13131402401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13131402821) 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, 15233215 + ... + 15234076.

It is an arithmetic number, because the mean of its divisors is an integer number (3290467536).

Almost surely, 2^13131402421 is an apocalyptic number.

It is an amenable number.

13131402421 is a deficient number, since it is larger than the sum of its proper divisors (30467723).

13131402421 is an equidigital number, since it uses as much as digits as its factorization.

13131402421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30467722.

The product of its (nonzero) digits is 576, while the sum is 22.

Adding to 13131402421 its reverse (12420413131), we get a palindrome (25551815552).

The spelling of 13131402421 in words is "thirteen billion, one hundred thirty-one million, four hundred two thousand, four hundred twenty-one".