4222021121 has 4 divisors (see below), whose sum is σ = 4291234644. Its totient is φ = 4152807600.

The previous prime is 4222021117. The next prime is 4222021157. The reversal of 4222021121 is 1211202224.

4222021121 is digitally balanced in base 3, 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.

It can be written as a sum of positive squares in 2 ways, for example, as 1878008896 + 2344012225 = 43336^2 + 48415^2 .

It is a cyclic number.

It is not a de Polignac number, because 4222021121 - 2² = 4222021117 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 4222021121.

It is not an unprimeable number, because it can be changed into a prime (4222021171) 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, 34606670 + ... + 34606791.

It is an arithmetic number, because the mean of its divisors is an integer number (1072808661).

Almost surely, 2^4222021121 is an apocalyptic number.

It is an amenable number.

4222021121 is a deficient number, since it is larger than the sum of its proper divisors (69213523).

4222021121 is an equidigital number, since it uses as much as digits as its factorization.

4222021121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69213522.

The product of its (nonzero) digits is 128, while the sum is 17.

The square root of 4222021121 is about 64977.0815057125. The cubic root of 4222021121 is about 1616.2435343165.

Adding to 4222021121 its reverse (1211202224), we get a palindrome (5433223345).

The spelling of 4222021121 in words is "four billion, two hundred twenty-two million, twenty-one thousand, one hundred twenty-one".