13121122220243 has 8 divisors (see below), whose sum is σ = 13154654361600. Its totient is φ = 13087594115200.

The previous prime is 13121122220231. The next prime is 13121122220251. The reversal of 13121122220243 is 34202222112131.

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

It is a cyclic number.

It is not a de Polignac number, because 13121122220243 - 2³⁸ = 12846244313299 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13121122220543) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5555246 + ... + 7556652.

It is an arithmetic number, because the mean of its divisors is an integer number (1644331795200).

Almost surely, 2^{13121122220243} is an apocalyptic number.

13121122220243 is a deficient number, since it is larger than the sum of its proper divisors (33532141357).

13121122220243 is a wasteful number, since it uses less digits than its factorization.

13121122220243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2018157.

The product of its (nonzero) digits is 2304, while the sum is 26.

Adding to 13121122220243 its reverse (34202222112131), we get a palindrome (47323344332374).

The spelling of 13121122220243 in words is "thirteen trillion, one hundred twenty-one billion, one hundred twenty-two million, two hundred twenty thousand, two hundred forty-three".