13123012321011 has 4 divisors (see below), whose sum is σ = 17497349761352. Its totient is φ = 8748674880672.

The previous prime is 13123012320997. The next prime is 13123012321033. The reversal of 13123012321011 is 11012321032131.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 13123012321011 - 2¹¹ = 13123012318963 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13123012321051) 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, 2187168720166 + ... + 2187168720171.

It is an arithmetic number, because the mean of its divisors is an integer number (4374337440338).

Almost surely, 2^{13123012321011} is an apocalyptic number.

13123012321011 is a deficient number, since it is larger than the sum of its proper divisors (4374337440341).

13123012321011 is an equidigital number, since it uses as much as digits as its factorization.

13123012321011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4374337440340.

The product of its (nonzero) digits is 216, while the sum is 21.

Adding to 13123012321011 its reverse (11012321032131), we get a palindrome (24135333353142).

The spelling of 13123012321011 in words is "thirteen trillion, one hundred twenty-three billion, twelve million, three hundred twenty-one thousand, eleven".