13122212231 has 8 divisors (see below), whose sum is σ = 13823646720. Its totient is φ = 12421856952.

The previous prime is 13122212221. The next prime is 13122212249. The reversal of 13122212231 is 13221222131.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13122212231 is a prime.

It is a super-2 number, since 2×13122212231² (a number of 21 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 (13122212221) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 244775 + ... + 293528.

It is an arithmetic number, because the mean of its divisors is an integer number (1727955840).

Almost surely, 2^13122212231 is an apocalyptic number.

13122212231 is a deficient number, since it is larger than the sum of its proper divisors (701434489).

13122212231 is a wasteful number, since it uses less digits than its factorization.

13122212231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 539605.

The product of its digits is 288, while the sum is 20.

Adding to 13122212231 its reverse (13221222131), we get a palindrome (26343434362).

The spelling of 13122212231 in words is "thirteen billion, one hundred twenty-two million, two hundred twelve thousand, two hundred thirty-one".