13331434021 has 4 divisors (see below), whose sum is σ = 13492053792. Its totient is φ = 13170814252.

The previous prime is 13331433931. The next prime is 13331434043. The reversal of 13331434021 is 12043413331.

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: 12043413331 = 74521 ⋅161611.

It is a cyclic number.

It is not a de Polignac number, because 13331434021 - 2¹¹ = 13331431973 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 (13331434121) 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, 80309761 + ... + 80309926.

It is an arithmetic number, because the mean of its divisors is an integer number (3373013448).

Almost surely, 2^13331434021 is an apocalyptic number.

It is an amenable number.

13331434021 is a deficient number, since it is larger than the sum of its proper divisors (160619771).

13331434021 is an equidigital number, since it uses as much as digits as its factorization.

13331434021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 160619770.

The product of its (nonzero) digits is 2592, while the sum is 25.

Adding to 13331434021 its reverse (12043413331), we get a palindrome (25374847352).

The spelling of 13331434021 in words is "thirteen billion, three hundred thirty-one million, four hundred thirty-four thousand, twenty-one".