13123021022197 has 4 divisors (see below), whose sum is σ = 13123043874700. Its totient is φ = 13122998169696.

The previous prime is 13123021022179. The next prime is 13123021022227. The reversal of 13123021022197 is 79122012032131.

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 4732926429841 + 8390094592356 = 2175529^2 + 2896566^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13123021022197 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13123021022597) 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, 10542072 + ... + 11720977.

It is an arithmetic number, because the mean of its divisors is an integer number (3280760968675).

Almost surely, 2^{13123021022197} is an apocalyptic number.

It is an amenable number.

13123021022197 is a deficient number, since it is larger than the sum of its proper divisors (22852503).

13123021022197 is an equidigital number, since it uses as much as digits as its factorization.

13123021022197 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22852502.

The product of its (nonzero) digits is 9072, while the sum is 34.

The spelling of 13123021022197 in words is "thirteen trillion, one hundred twenty-three billion, twenty-one million, twenty-two thousand, one hundred ninety-seven".