2222445121 has 4 divisors (see below), whose sum is σ = 2393402452. Its totient is φ = 2051487792.

The previous prime is 2222445031. The next prime is 2222445133. The reversal of 2222445121 is 1215442222.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1486950721 + 735494400 = 38561^2 + 27120^2 .

It is a cyclic number.

It is not a de Polignac number, because 2222445121 - 2¹⁷ = 2222314049 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2222445161) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 85478646 + ... + 85478671.

It is an arithmetic number, because the mean of its divisors is an integer number (598350613).

Almost surely, 2^2222445121 is an apocalyptic number.

It is an amenable number.

2222445121 is a deficient number, since it is larger than the sum of its proper divisors (170957331).

2222445121 is a wasteful number, since it uses less digits than its factorization.

2222445121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 170957330.

The product of its digits is 2560, while the sum is 25.

The square root of 2222445121 is about 47142.8162183805. The cubic root of 2222445121 is about 1304.9995098915. Note that the first 3 decimals are identical.

Adding to 2222445121 its reverse (1215442222), we get a palindrome (3437887343).

The spelling of 2222445121 in words is "two billion, two hundred twenty-two million, four hundred forty-five thousand, one hundred twenty-one".