11122311121 has 8 divisors (see below), whose sum is σ = 11402015688. Its totient is φ = 10843008000.

The previous prime is 11122311107. The next prime is 11122311197. The reversal of 11122311121 is 12111322111.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 640646721 + 10481664400 = 25311^2 + 102380^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 11122311121 - 2¹¹ = 11122309073 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11122311095 and 11122311104.

It is not an unprimeable number, because it can be changed into a prime (11122311821) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 43860 + ... + 155461.

It is an arithmetic number, because the mean of its divisors is an integer number (1425251961).

Almost surely, 2^11122311121 is an apocalyptic number.

It is an amenable number.

11122311121 is a deficient number, since it is larger than the sum of its proper divisors (279704567).

11122311121 is a wasteful number, since it uses less digits than its factorization.

11122311121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 200723.

The product of its digits is 24, while the sum is 16.

Adding to 11122311121 its reverse (12111322111), we get a palindrome (23233633232).

The spelling of 11122311121 in words is "eleven billion, one hundred twenty-two million, three hundred eleven thousand, one hundred twenty-one".