420210101 has 2 divisors, whose sum is σ = 420210102. Its totient is φ = 420210100.

The previous prime is 420210067. The next prime is 420210113. The reversal of 420210101 is 101012024.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 213598225 + 206611876 = 14615^2 + 14374^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-420210101 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (420210121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210105050 + 210105051.

It is an arithmetic number, because the mean of its divisors is an integer number (210105051).

Almost surely, 2^420210101 is an apocalyptic number.

It is an amenable number.

420210101 is a deficient number, since it is larger than the sum of its proper divisors (1).

420210101 is an equidigital number, since it uses as much as digits as its factorization.

420210101 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16, while the sum is 11.

The square root of 420210101 is about 20499.0268305595. The cubic root of 420210101 is about 749.0120924748.

Adding to 420210101 its reverse (101012024), we get a palindrome (521222125).

The spelling of 420210101 in words is "four hundred twenty million, two hundred ten thousand, one hundred one".