421130123 has 2 divisors, whose sum is σ = 421130124. Its totient is φ = 421130122.

The previous prime is 421130113. The next prime is 421130167. The reversal of 421130123 is 321031124.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 421130123 - 2⁸ = 421129867 is a prime.

It is not a weakly prime, because it can be changed into another prime (421130113) 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, 210565061 + 210565062.

It is an arithmetic number, because the mean of its divisors is an integer number (210565062).

Almost surely, 2^421130123 is an apocalyptic number.

421130123 is a deficient number, since it is larger than the sum of its proper divisors (1).

421130123 is an equidigital number, since it uses as much as digits as its factorization.

421130123 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 421130123 is about 20521.4551871937. The cubic root of 421130123 is about 749.5583313636.

Adding to 421130123 its reverse (321031124), we get a palindrome (742161247).

The spelling of 421130123 in words is "four hundred twenty-one million, one hundred thirty thousand, one hundred twenty-three".