12222011121 has 16 divisors (see below), whose sum is σ = 16557308928. Its totient is φ = 8018370000.

The previous prime is 12222011119. The next prime is 12222011143. The reversal of 12222011121 is 12111022221.

It is not a de Polignac number, because 12222011121 - 2¹ = 12222011119 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12222011121.

It is not an unprimeable number, because it can be changed into a prime (12222011821) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 77605 + ... + 174546.

It is an arithmetic number, because the mean of its divisors is an integer number (1034831808).

Almost surely, 2^12222011121 is an apocalyptic number.

It is an amenable number.

12222011121 is a deficient number, since it is larger than the sum of its proper divisors (4335297807).

12222011121 is a wasteful number, since it uses less digits than its factorization.

12222011121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 252412.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 12222011121 its reverse (12111022221), we get a palindrome (24333033342).

The spelling of 12222011121 in words is "twelve billion, two hundred twenty-two million, eleven thousand, one hundred twenty-one".