13347121231 has 4 divisors (see below), whose sum is σ = 13349270200. Its totient is φ = 13344972264.

The previous prime is 13347121213. The next prime is 13347121247. The reversal of 13347121231 is 13212174331.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13212174331 = 13931 ⋅948401.

It is a cyclic number.

It is not a de Polignac number, because 13347121231 - 2²³ = 13338732623 is a prime.

It is a super-2 number, since 2×13347121231² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 13347121231.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13347121201) 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, 1065141 + ... + 1077598.

It is an arithmetic number, because the mean of its divisors is an integer number (3337317550).

Almost surely, 2^13347121231 is an apocalyptic number.

13347121231 is a deficient number, since it is larger than the sum of its proper divisors (2148969).

13347121231 is an equidigital number, since it uses as much as digits as its factorization.

13347121231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2148968.

The product of its digits is 3024, while the sum is 28.

Adding to 13347121231 its reverse (13212174331), we get a palindrome (26559295562).

The spelling of 13347121231 in words is "thirteen billion, three hundred forty-seven million, one hundred twenty-one thousand, two hundred thirty-one".