2222001121 has 4 divisors (see below), whose sum is σ = 2232532144. Its totient is φ = 2211470100.

The previous prime is 2222001073. The next prime is 2222001139. The reversal of 2222001121 is 1211002222.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1211002222 = 2 ⋅605501111.

It is a cyclic number.

It is not a de Polignac number, because 2222001121 - 2⁷ = 2222000993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2222007121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5265195 + ... + 5265616.

It is an arithmetic number, because the mean of its divisors is an integer number (558133036).

Almost surely, 2^2222001121 is an apocalyptic number.

It is an amenable number.

2222001121 is a deficient number, since it is larger than the sum of its proper divisors (10531023).

2222001121 is a wasteful number, since it uses less digits than its factorization.

2222001121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10531022.

The product of its (nonzero) digits is 32, while the sum is 13.

The square root of 2222001121 is about 47138.1068881643. The cubic root of 2222001121 is about 1304.9125998532.

Adding to 2222001121 its reverse (1211002222), we get a palindrome (3433003343).

The spelling of 2222001121 in words is "two billion, two hundred twenty-two million, one thousand, one hundred twenty-one".