2201223121 has 6 divisors (see below), whose sum is σ = 2338323830. Its totient is φ = 2071739136.

The previous prime is 2201223103. The next prime is 2201223127. The reversal of 2201223121 is 1213221022.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 312016896 + 1889206225 = 17664^2 + 43465^2 .

It is not a de Polignac number, because 2201223121 - 2¹⁹ = 2200698833 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2201223095 and 2201223104.

It is not an unprimeable number, because it can be changed into a prime (2201223127) 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 5 ways as a sum of consecutive naturals, for example, 3808056 + ... + 3808633.

Almost surely, 2^2201223121 is an apocalyptic number.

It is an amenable number.

2201223121 is a deficient number, since it is larger than the sum of its proper divisors (137100709).

2201223121 is an equidigital number, since it uses as much as digits as its factorization.

2201223121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7616723 (or 7616706 counting only the distinct ones).

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

The square root of 2201223121 is about 46917.1943001710. The cubic root of 2201223121 is about 1300.8324295781.

Adding to 2201223121 its reverse (1213221022), we get a palindrome (3414444143).

The spelling of 2201223121 in words is "two billion, two hundred one million, two hundred twenty-three thousand, one hundred twenty-one".