4201242421 has 2 divisors, whose sum is σ = 4201242422. Its totient is φ = 4201242420.

The previous prime is 4201242413. The next prime is 4201242431. The reversal of 4201242421 is 1242421024.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2551664196 + 1649578225 = 50514^2 + 40615^2 .

It is a cyclic number.

It is not a de Polignac number, because 4201242421 - 2³ = 4201242413 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 4201242392 and 4201242401.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4201242431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2100621210 + 2100621211.

It is an arithmetic number, because the mean of its divisors is an integer number (2100621211).

Almost surely, 2^4201242421 is an apocalyptic number.

It is an amenable number.

4201242421 is a deficient number, since it is larger than the sum of its proper divisors (1).

4201242421 is an equidigital number, since it uses as much as digits as its factorization.

4201242421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1024, while the sum is 22.

The square root of 4201242421 is about 64816.9917614201. The cubic root of 4201242421 is about 1613.5877222154.

Adding to 4201242421 its reverse (1242421024), we get a palindrome (5443663445).

The spelling of 4201242421 in words is "four billion, two hundred one million, two hundred forty-two thousand, four hundred twenty-one".