13320021231031 has 4 divisors (see below), whose sum is σ = 13320326730672. Its totient is φ = 13319715731392.

The previous prime is 13320021230993. The next prime is 13320021231061. The reversal of 13320021231031 is 13013212002331.

13320021231031 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.

It is a cyclic number.

It is not a de Polignac number, because 13320021231031 - 2⁷ = 13320021230903 is a prime.

It is a super-2 number, since 2×13320021231031² (a number of 27 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 = 13320021230993 and 13320021231011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13320021231061) 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, 152684410 + ... + 152771623.

It is an arithmetic number, because the mean of its divisors is an integer number (3330081682668).

Almost surely, 2^{13320021231031} is an apocalyptic number.

13320021231031 is a deficient number, since it is larger than the sum of its proper divisors (305499641).

13320021231031 is an equidigital number, since it uses as much as digits as its factorization.

13320021231031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 305499640.

The product of its (nonzero) digits is 648, while the sum is 22.

Adding to 13320021231031 its reverse (13013212002331), we get a palindrome (26333233233362).

The spelling of 13320021231031 in words is "thirteen trillion, three hundred twenty billion, twenty-one million, two hundred thirty-one thousand, thirty-one".