13122042523321 has 4 divisors (see below), whose sum is σ = 13893927377652. Its totient is φ = 12350157668992.

The previous prime is 13122042523301. The next prime is 13122042523427. The reversal of 13122042523321 is 12332524022131.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 12263758861225 + 858283662096 = 3501965^2 + 926436^2 .

It is a cyclic number.

It is not a de Polignac number, because 13122042523321 - 2¹³ = 13122042515129 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13122042523301) 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, 385942427140 + ... + 385942427173.

It is an arithmetic number, because the mean of its divisors is an integer number (3473481844413).

Almost surely, 2^{13122042523321} is an apocalyptic number.

It is an amenable number.

13122042523321 is a deficient number, since it is larger than the sum of its proper divisors (771884854331).

13122042523321 is an equidigital number, since it uses as much as digits as its factorization.

13122042523321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 771884854330.

The product of its (nonzero) digits is 17280, while the sum is 31.

Adding to 13122042523321 its reverse (12332524022131), we get a palindrome (25454566545452).

The spelling of 13122042523321 in words is "thirteen trillion, one hundred twenty-two billion, forty-two million, five hundred twenty-three thousand, three hundred twenty-one".