13113430021 has 4 divisors (see below), whose sum is σ = 13143301600. Its totient is φ = 13083558444.

The previous prime is 13113430019. The next prime is 13113430067. The reversal of 13113430021 is 12003431131.

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, and also an emirpimes, since its reverse is a distinct semiprime: 12003431131 = 1237 ⋅9703663.

It is a cyclic number.

It is not a de Polignac number, because 13113430021 - 2¹ = 13113430019 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13113430721) 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, 14935131 + ... + 14936008.

It is an arithmetic number, because the mean of its divisors is an integer number (3285825400).

Almost surely, 2^13113430021 is an apocalyptic number.

It is an amenable number.

13113430021 is a deficient number, since it is larger than the sum of its proper divisors (29871579).

13113430021 is an equidigital number, since it uses as much as digits as its factorization.

13113430021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29871578.

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 13113430021 its reverse (12003431131), we get a palindrome (25116861152).

The spelling of 13113430021 in words is "thirteen billion, one hundred thirteen million, four hundred thirty thousand, twenty-one".