11121242051 has 4 divisors (see below), whose sum is σ = 11706570600. Its totient is φ = 10535913504.

The previous prime is 11121242047. The next prime is 11121242059. The reversal of 11121242051 is 15024212111.

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 11121242051 - 2² = 11121242047 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11121242059) 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, 292664246 + ... + 292664283.

It is an arithmetic number, because the mean of its divisors is an integer number (2926642650).

Almost surely, 2^11121242051 is an apocalyptic number.

11121242051 is a deficient number, since it is larger than the sum of its proper divisors (585328549).

11121242051 is an equidigital number, since it uses as much as digits as its factorization.

11121242051 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 585328548.

The product of its (nonzero) digits is 160, while the sum is 20.

Adding to 11121242051 its reverse (15024212111), we get a palindrome (26145454162).

The spelling of 11121242051 in words is "eleven billion, one hundred twenty-one million, two hundred forty-two thousand, fifty-one".