13121104443242 has 16 divisors (see below), whose sum is σ = 19796624128512. Its totient is φ = 6522234334320.

The previous prime is 13121104443241. The next prime is 13121104443283. The reversal of 13121104443242 is 24234440112131.

It is a junction number, because it is equal to n+sod(n) for n = 13121104443199 and 13121104443208.

It is not an unprimeable number, because it can be changed into a prime (13121104443241) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4604267 + ... + 6887777.

It is an arithmetic number, because the mean of its divisors is an integer number (1237289008032).

Almost surely, 2^{13121104443242} is an apocalyptic number.

13121104443242 is a deficient number, since it is larger than the sum of its proper divisors (6675519685270).

13121104443242 is a wasteful number, since it uses less digits than its factorization.

13121104443242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2300293.

The product of its (nonzero) digits is 18432, while the sum is 32.

Adding to 13121104443242 its reverse (24234440112131), we get a palindrome (37355544555373).

The spelling of 13121104443242 in words is "thirteen trillion, one hundred twenty-one billion, one hundred four million, four hundred forty-three thousand, two hundred forty-two".