13121333011121 has 4 divisors (see below), whose sum is σ = 13121347526772. Its totient is φ = 13121318495472.

The previous prime is 13121333011093. The next prime is 13121333011223. The reversal of 13121333011121 is 12111033312131.

13121333011121 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 6171070778896 + 6950262232225 = 2484164^2 + 2636335^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13121333011121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13121333011621) 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, 5804966 + ... + 7742111.

It is an arithmetic number, because the mean of its divisors is an integer number (3280336881693).

Almost surely, 2^{13121333011121} is an apocalyptic number.

It is an amenable number.

13121333011121 is a deficient number, since it is larger than the sum of its proper divisors (14515651).

13121333011121 is an equidigital number, since it uses as much as digits as its factorization.

13121333011121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14515650.

The product of its (nonzero) digits is 324, while the sum is 23.

Adding to 13121333011121 its reverse (12111033312131), we get a palindrome (25232366323252).

The spelling of 13121333011121 in words is "thirteen trillion, one hundred twenty-one billion, three hundred thirty-three million, eleven thousand, one hundred twenty-one".