13121320002121 has 4 divisors (see below), whose sum is σ = 13194623466000. Its totient is φ = 13048016538244.

The previous prime is 13121320002097. The next prime is 13121320002143. The reversal of 13121320002121 is 12120002312131.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 13121320002121 - 2¹¹ = 13121320000073 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13121320002521) 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, 36651731671 + ... + 36651732028.

It is an arithmetic number, because the mean of its divisors is an integer number (3298655866500).

Almost surely, 2^{13121320002121} is an apocalyptic number.

It is an amenable number.

13121320002121 is a deficient number, since it is larger than the sum of its proper divisors (73303463879).

13121320002121 is an equidigital number, since it uses as much as digits as its factorization.

13121320002121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73303463878.

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 13121320002121 its reverse (12120002312131), we get a palindrome (25241322314252).

The spelling of 13121320002121 in words is "thirteen trillion, one hundred twenty-one billion, three hundred twenty million, two thousand, one hundred twenty-one".