11121253243 has 4 divisors (see below), whose sum is σ = 11121464248. Its totient is φ = 11121042240.

The previous prime is 11121253237. The next prime is 11121253267. The reversal of 11121253243 is 34235212111.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 11121253243 - 2¹⁷ = 11121122171 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11121256243) 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, 48148 + ... + 156718.

It is an arithmetic number, because the mean of its divisors is an integer number (2780366062).

Almost surely, 2^11121253243 is an apocalyptic number.

11121253243 is a deficient number, since it is larger than the sum of its proper divisors (211005).

11121253243 is a wasteful number, since it uses less digits than its factorization.

11121253243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 211004.

The product of its digits is 1440, while the sum is 25.

Adding to 11121253243 its reverse (34235212111), we get a palindrome (45356465354).

The spelling of 11121253243 in words is "eleven billion, one hundred twenty-one million, two hundred fifty-three thousand, two hundred forty-three".