13121311041121 has 4 divisors (see below), whose sum is σ = 13121606737044. Its totient is φ = 13121015345200.

The previous prime is 13121311041061. The next prime is 13121311041127. The reversal of 13121311041121 is 12114011312131.

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 5902416801121 + 7218894240000 = 2429489^2 + 2686800^2 .

It is a cyclic number.

It is not a de Polignac number, because 13121311041121 - 2⁹ = 13121311040609 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13121311041092 and 13121311041101.

It is not an unprimeable number, because it can be changed into a prime (13121311041127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 147781390 + ... + 147870151.

It is an arithmetic number, because the mean of its divisors is an integer number (3280401684261).

Almost surely, 2^{13121311041121} is an apocalyptic number.

It is an amenable number.

13121311041121 is a deficient number, since it is larger than the sum of its proper divisors (295695923).

13121311041121 is an equidigital number, since it uses as much as digits as its factorization.

13121311041121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 295695922.

The product of its (nonzero) digits is 144, while the sum is 22.

Adding to 13121311041121 its reverse (12114011312131), we get a palindrome (25235322353252).

The spelling of 13121311041121 in words is "thirteen trillion, one hundred twenty-one billion, three hundred eleven million, forty-one thousand, one hundred twenty-one".