420241121 has 2 divisors, whose sum is σ = 420241122. Its totient is φ = 420241120.

The previous prime is 420241097. The next prime is 420241123. The reversal of 420241121 is 121142024.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 309760000 + 110481121 = 17600^2 + 10511^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-420241121 is a prime.

It is a Sophie Germain prime.

Together with 420241123, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 420241121.

It is not a weakly prime, because it can be changed into another prime (420241123) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210120560 + 210120561.

It is an arithmetic number, because the mean of its divisors is an integer number (210120561).

Almost surely, 2^420241121 is an apocalyptic number.

It is an amenable number.

420241121 is a deficient number, since it is larger than the sum of its proper divisors (1).

420241121 is an equidigital number, since it uses as much as digits as its factorization.

420241121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 128, while the sum is 17.

The square root of 420241121 is about 20499.7834378805. The cubic root of 420241121 is about 749.0305227659.

Adding to 420241121 its reverse (121142024), we get a palindrome (541383145).

The spelling of 420241121 in words is "four hundred twenty million, two hundred forty-one thousand, one hundred twenty-one".