12221103121 has 16 divisors (see below), whose sum is σ = 12781509840. Its totient is φ = 11670220800.

The previous prime is 12221103109. The next prime is 12221103149. The reversal of 12221103121 is 12130112221.

12221103121 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 8 ways, for example, as 7540490896 + 4680612225 = 86836^2 + 68415^2 .

It is a cyclic number.

It is not a de Polignac number, because 12221103121 - 2²³ = 12212714513 is a prime.

It is a super-2 number, since 2×12221103121² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12221103095 and 12221103104.

It is not an unprimeable number, because it can be changed into a prime (12221103151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3797305 + ... + 3800521.

It is an arithmetic number, because the mean of its divisors is an integer number (798844365).

Almost surely, 2^12221103121 is an apocalyptic number.

It is an amenable number.

12221103121 is a deficient number, since it is larger than the sum of its proper divisors (560406719).

12221103121 is a wasteful number, since it uses less digits than its factorization.

12221103121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4644.

The product of its (nonzero) digits is 48, while the sum is 16.

Adding to 12221103121 its reverse (12130112221), we get a palindrome (24351215342).

The spelling of 12221103121 in words is "twelve billion, two hundred twenty-one million, one hundred three thousand, one hundred twenty-one".