2204020421 has 2 divisors, whose sum is σ = 2204020422. Its totient is φ = 2204020420.

The previous prime is 2204020417. The next prime is 2204020457. The reversal of 2204020421 is 1240204022.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1657629796 + 546390625 = 40714^2 + 23375^2 .

It is a cyclic number.

It is not a de Polignac number, because 2204020421 - 2² = 2204020417 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2204020421.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2204023421) 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, 1102010210 + 1102010211.

It is an arithmetic number, because the mean of its divisors is an integer number (1102010211).

Almost surely, 2^2204020421 is an apocalyptic number.

It is an amenable number.

2204020421 is a deficient number, since it is larger than the sum of its proper divisors (1).

2204020421 is an equidigital number, since it uses as much as digits as its factorization.

2204020421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 256, while the sum is 17.

The square root of 2204020421 is about 46946.9958676804. The cubic root of 2204020421 is about 1301.3832261197.

Adding to 2204020421 its reverse (1240204022), we get a palindrome (3444224443).

The spelling of 2204020421 in words is "two billion, two hundred four million, twenty thousand, four hundred twenty-one".