11213231243 has 4 divisors (see below), whose sum is σ = 11397054768. Its totient is φ = 11029407720.

The previous prime is 11213231231. The next prime is 11213231257. The reversal of 11213231243 is 34213231211.

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 11213231243 - 2⁶ = 11213231179 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11213231203) 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, 91911671 + ... + 91911792.

It is an arithmetic number, because the mean of its divisors is an integer number (2849263692).

Almost surely, 2^11213231243 is an apocalyptic number.

11213231243 is a deficient number, since it is larger than the sum of its proper divisors (183823525).

11213231243 is an equidigital number, since it uses as much as digits as its factorization.

11213231243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 183823524.

The product of its digits is 864, while the sum is 23.

Adding to 11213231243 its reverse (34213231211), we get a palindrome (45426462454).

The spelling of 11213231243 in words is "eleven billion, two hundred thirteen million, two hundred thirty-one thousand, two hundred forty-three".