421220113 has 2 divisors, whose sum is σ = 421220114. Its totient is φ = 421220112.

The previous prime is 421220077. The next prime is 421220161. The reversal of 421220113 is 311022124.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 279324369 + 141895744 = 16713^2 + 11912^2 .

It is a cyclic number.

It is not a de Polignac number, because 421220113 - 2¹⁷ = 421089041 is a prime.

It is not a weakly prime, because it can be changed into another prime (421223113) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210610056 + 210610057.

It is an arithmetic number, because the mean of its divisors is an integer number (210610057).

Almost surely, 2^421220113 is an apocalyptic number.

It is an amenable number.

421220113 is a deficient number, since it is larger than the sum of its proper divisors (1).

421220113 is an equidigital number, since it uses as much as digits as its factorization.

421220113 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 96, while the sum is 16.

The square root of 421220113 is about 20523.6476533778. The cubic root of 421220113 is about 749.6117178321.

Adding to 421220113 its reverse (311022124), we get a palindrome (732242237).

The spelling of 421220113 in words is "four hundred twenty-one million, two hundred twenty thousand, one hundred thirteen".