4222322021 has 4 divisors (see below), whose sum is σ = 4265851212. Its totient is φ = 4178792832.

The previous prime is 4222322003. The next prime is 4222322023. The reversal of 4222322021 is 1202232224.

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 2033017921 + 2189304100 = 45089^2 + 46790^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4222322021 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 4222321984 and 4222322002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4222322023) 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 3 ways as a sum of consecutive naturals, for example, 21764450 + ... + 21764643.

It is an arithmetic number, because the mean of its divisors is an integer number (1066462803).

Almost surely, 2^4222322021 is an apocalyptic number.

It is an amenable number.

4222322021 is a deficient number, since it is larger than the sum of its proper divisors (43529191).

4222322021 is an equidigital number, since it uses as much as digits as its factorization.

4222322021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43529190.

The product of its (nonzero) digits is 768, while the sum is 20.

The square root of 4222322021 is about 64979.3968962470. The cubic root of 4222322021 is about 1616.2819295236.

Adding to 4222322021 its reverse (1202232224), we get a palindrome (5424554245).

The spelling of 4222322021 in words is "four billion, two hundred twenty-two million, three hundred twenty-two thousand, twenty-one".