1121222011121 has 4 divisors (see below), whose sum is σ = 1131508451700. Its totient is φ = 1110935570544.

The previous prime is 1121222011111. The next prime is 1121222011183. The reversal of 1121222011121 is 1211102221211.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 419011530721 + 702210480400 = 647311^2 + 837980^2 .

It is a cyclic number.

It is not a de Polignac number, because 1121222011121 - 2⁶ = 1121222011057 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1121222011121.

It is not an unprimeable number, because it can be changed into a prime (1121222011111) 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, 5143220126 + ... + 5143220343.

It is an arithmetic number, because the mean of its divisors is an integer number (282877112925).

Almost surely, 2^{1121222011121} is an apocalyptic number.

It is an amenable number.

1121222011121 is a deficient number, since it is larger than the sum of its proper divisors (10286440579).

1121222011121 is a wasteful number, since it uses less digits than its factorization.

1121222011121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10286440578.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 1121222011121 its reverse (1211102221211), we get a palindrome (2332324232332).

The spelling of 1121222011121 in words is "one trillion, one hundred twenty-one billion, two hundred twenty-two million, eleven thousand, one hundred twenty-one".