2004222421 has 2 divisors, whose sum is σ = 2004222422. Its totient is φ = 2004222420.

The previous prime is 2004222419. The next prime is 2004222443. The reversal of 2004222421 is 1242224002.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1830641796 + 173580625 = 42786^2 + 13175^2 .

It is a cyclic number.

It is not a de Polignac number, because 2004222421 - 2¹ = 2004222419 is a prime.

Together with 2004222419, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2004222481) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1002111210 + 1002111211.

It is an arithmetic number, because the mean of its divisors is an integer number (1002111211).

Almost surely, 2^2004222421 is an apocalyptic number.

It is an amenable number.

2004222421 is a deficient number, since it is larger than the sum of its proper divisors (1).

2004222421 is an equidigital number, since it uses as much as digits as its factorization.

2004222421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 512, while the sum is 19.

The square root of 2004222421 is about 44768.5427616312. The cubic root of 2004222421 is about 1260.8070795053.

Adding to 2004222421 its reverse (1242224002), we get a palindrome (3246446423).

The spelling of 2004222421 in words is "two billion, four million, two hundred twenty-two thousand, four hundred twenty-one".