13122231112013 has 4 divisors (see below), whose sum is σ = 13122239663868. Its totient is φ = 13122222560160.

The previous prime is 13122231112009. The next prime is 13122231112019. The reversal of 13122231112013 is 31021113222131.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 12561764770564 + 560466341449 = 3544258^2 + 748643^2 .

It is a cyclic number.

It is not a de Polignac number, because 13122231112013 - 2² = 13122231112009 is a prime.

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 13122231112013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13122231112019) 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, 1269818 + ... + 5277963.

It is an arithmetic number, because the mean of its divisors is an integer number (3280559915967).

Almost surely, 2^{13122231112013} is an apocalyptic number.

It is an amenable number.

13122231112013 is a deficient number, since it is larger than the sum of its proper divisors (8551855).

13122231112013 is an equidigital number, since it uses as much as digits as its factorization.

13122231112013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8551854.

The product of its (nonzero) digits is 432, while the sum is 23.

Adding to 13122231112013 its reverse (31021113222131), we get a palindrome (44143344334144).

The spelling of 13122231112013 in words is "thirteen trillion, one hundred twenty-two billion, two hundred thirty-one million, one hundred twelve thousand, thirteen".