13320434031021 has 48 divisors (see below), whose sum is σ = 20735010930816. Its totient is φ = 8191521283968.

The previous prime is 13320434031007. The next prime is 13320434031103. The reversal of 13320434031021 is 12013043402331.

It is a happy number.

13320434031021 is a `hidden beast` number, since 1 + 3 + 3 + 2 + 0 + 4 + 340 + 310 + 2 + 1 = 666.

It is a de Polignac number, because none of the positive numbers 2^k-13320434031021 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13320434031521) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1342374766 + ... + 1342384688.

It is an arithmetic number, because the mean of its divisors is an integer number (431979394392).

Almost surely, 2^{13320434031021} is an apocalyptic number.

It is an amenable number.

13320434031021 is a deficient number, since it is larger than the sum of its proper divisors (7414576899795).

13320434031021 is a wasteful number, since it uses less digits than its factorization.

13320434031021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16722 (or 16719 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 27.

Adding to 13320434031021 its reverse (12013043402331), we get a palindrome (25333477433352).

The spelling of 13320434031021 in words is "thirteen trillion, three hundred twenty billion, four hundred thirty-four million, thirty-one thousand, twenty-one".