13013020121 has 4 divisors (see below), whose sum is σ = 13013289744. Its totient is φ = 13012750500.

The previous prime is 13013020087. The next prime is 13013020129. The reversal of 13013020121 is 12102031031.

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 13013020121 - 2⁶ = 13013020057 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13013020096 and 13013020105.

It is not an unprimeable number, because it can be changed into a prime (13013020129) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40355 + ... + 166296.

It is an arithmetic number, because the mean of its divisors is an integer number (3253322436).

Almost surely, 2^13013020121 is an apocalyptic number.

It is an amenable number.

13013020121 is a deficient number, since it is larger than the sum of its proper divisors (269623).

13013020121 is an equidigital number, since it uses as much as digits as its factorization.

13013020121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 269622.

The product of its (nonzero) digits is 36, while the sum is 14.

Adding to 13013020121 its reverse (12102031031), we get a palindrome (25115051152).

The spelling of 13013020121 in words is "thirteen billion, thirteen million, twenty thousand, one hundred twenty-one".