13123211011 has 4 divisors (see below), whose sum is σ = 13203721672. Its totient is φ = 13042700352.

The previous prime is 13123210981. The next prime is 13123211071. The reversal of 13123211011 is 11011232131.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 13123211011 - 2²³ = 13114822403 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13123211071) 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, 40255086 + ... + 40255411.

It is an arithmetic number, because the mean of its divisors is an integer number (3300930418).

Almost surely, 2^13123211011 is an apocalyptic number.

13123211011 is a deficient number, since it is larger than the sum of its proper divisors (80510661).

13123211011 is an equidigital number, since it uses as much as digits as its factorization.

13123211011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80510660.

The product of its (nonzero) digits is 36, while the sum is 16.

Adding to 13123211011 its reverse (11011232131), we get a palindrome (24134443142).

The spelling of 13123211011 in words is "thirteen billion, one hundred twenty-three million, two hundred eleven thousand, eleven".