222001203121 has 4 divisors (see below), whose sum is σ = 223965815652. Its totient is φ = 220036590592.

The previous prime is 222001203119. The next prime is 222001203173. The reversal of 222001203121 is 121302100222.

It is a happy number.

222001203121 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 121302100222 = 2 ⋅60651050111.

It can be written as a sum of positive squares in 2 ways, for example, as 3621632400 + 218379570721 = 60180^2 + 467311^2 .

It is a cyclic number.

It is not a de Polignac number, because 222001203121 - 2¹ = 222001203119 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 222001203095 and 222001203104.

It is not an unprimeable number, because it can be changed into a prime (222001209121) 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 3 ways as a sum of consecutive naturals, for example, 982306096 + ... + 982306321.

It is an arithmetic number, because the mean of its divisors is an integer number (55991453913).

Almost surely, 2^222001203121 is an apocalyptic number.

It is an amenable number.

222001203121 is a deficient number, since it is larger than the sum of its proper divisors (1964612531).

222001203121 is a wasteful number, since it uses less digits than its factorization.

222001203121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1964612530.

The product of its (nonzero) digits is 96, while the sum is 16.

Adding to 222001203121 its reverse (121302100222), we get a palindrome (343303303343).

The spelling of 222001203121 in words is "two hundred twenty-two billion, one million, two hundred three thousand, one hundred twenty-one".