13113212251 has 4 divisors (see below), whose sum is σ = 13186470600. Its totient is φ = 13039953904.

The previous prime is 13113212209. The next prime is 13113212297. The reversal of 13113212251 is 15221231131.

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 13113212251 - 2¹³ = 13113204059 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13113212051) 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, 36628906 + ... + 36629263.

It is an arithmetic number, because the mean of its divisors is an integer number (3296617650).

Almost surely, 2^13113212251 is an apocalyptic number.

13113212251 is a deficient number, since it is larger than the sum of its proper divisors (73258349).

13113212251 is an equidigital number, since it uses as much as digits as its factorization.

13113212251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73258348.

The product of its digits is 360, while the sum is 22.

Adding to 13113212251 its reverse (15221231131), we get a palindrome (28334443382).

The spelling of 13113212251 in words is "thirteen billion, one hundred thirteen million, two hundred twelve thousand, two hundred fifty-one".