13120443434431 has 4 divisors (see below), whose sum is σ = 13120456301032. Its totient is φ = 13120430567832.

The previous prime is 13120443434411. The next prime is 13120443434443. The reversal of 13120443434431 is 13443434402131.

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 13120443434431 - 2²¹ = 13120441337279 is a prime.

It is a super-2 number, since 2×13120443434431² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13120443434411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4758345 + ... + 6991618.

It is an arithmetic number, because the mean of its divisors is an integer number (3280114075258).

Almost surely, 2^{13120443434431} is an apocalyptic number.

13120443434431 is a deficient number, since it is larger than the sum of its proper divisors (12866601).

13120443434431 is a wasteful number, since it uses less digits than its factorization.

13120443434431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12866600.

The product of its (nonzero) digits is 165888, while the sum is 37.

Adding to 13120443434431 its reverse (13443434402131), we get a palindrome (26563877836562).

The spelling of 13120443434431 in words is "thirteen trillion, one hundred twenty billion, four hundred forty-three million, four hundred thirty-four thousand, four hundred thirty-one".