4405222121 has 4 divisors (see below), whose sum is σ = 4664352852. Its totient is φ = 4146091392.

The previous prime is 4405222093. The next prime is 4405222169. The reversal of 4405222121 is 1212225044.

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 3746786521 + 658435600 = 61211^2 + 25660^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4405222121 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (4405222021) 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, 129565340 + ... + 129565373.

It is an arithmetic number, because the mean of its divisors is an integer number (1166088213).

Almost surely, 2^4405222121 is an apocalyptic number.

It is an amenable number.

4405222121 is a deficient number, since it is larger than the sum of its proper divisors (259130731).

4405222121 is a wasteful number, since it uses less digits than its factorization.

4405222121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 259130730.

The product of its (nonzero) digits is 1280, while the sum is 23.

The square root of 4405222121 is about 66371.8473526238. The cubic root of 4405222121 is about 1639.2905568454.

Adding to 4405222121 its reverse (1212225044), we get a palindrome (5617447165).

The spelling of 4405222121 in words is "four billion, four hundred five million, two hundred twenty-two thousand, one hundred twenty-one".