13122312231 has 16 divisors (see below), whose sum is σ = 20031439104. Its totient is φ = 7485138624.

The previous prime is 13122312227. The next prime is 13122312233. The reversal of 13122312231 is 13221322131.

It is not a de Polignac number, because 13122312231 - 2² = 13122312227 is a prime.

It is a super-2 number, since 2×13122312231² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a junction number, because it is equal to n+sod(n) for n = 13122312198 and 13122312207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13122312233) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 543126 + ... + 566771.

It is an arithmetic number, because the mean of its divisors is an integer number (1251964944).

Almost surely, 2^13122312231 is an apocalyptic number.

13122312231 is a deficient number, since it is larger than the sum of its proper divisors (6909126873).

13122312231 is a wasteful number, since it uses less digits than its factorization.

13122312231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1110470.

The product of its digits is 432, while the sum is 21.

Adding to 13122312231 its reverse (13221322131), we get a palindrome (26343634362).

The spelling of 13122312231 in words is "thirteen billion, one hundred twenty-two million, three hundred twelve thousand, two hundred thirty-one".