421010123 has 2 divisors, whose sum is σ = 421010124. Its totient is φ = 421010122.

The previous prime is 421010071. The next prime is 421010129. The reversal of 421010123 is 321010124.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 421010123 - 2⁶ = 421010059 is a prime.

It is a Sophie Germain prime.

It is a junction number, because it is equal to n+sod(n) for n = 421010098 and 421010107.

It is not a weakly prime, because it can be changed into another prime (421010129) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210505061 + 210505062.

It is an arithmetic number, because the mean of its divisors is an integer number (210505062).

Almost surely, 2^421010123 is an apocalyptic number.

421010123 is a deficient number, since it is larger than the sum of its proper divisors (1).

421010123 is an equidigital number, since it uses as much as digits as its factorization.

421010123 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 48, while the sum is 14.

The square root of 421010123 is about 20518.5312096163. The cubic root of 421010123 is about 749.4871296616.

Adding to 421010123 its reverse (321010124), we get a palindrome (742020247).

Subtracting from 421010123 its reverse (321010124), we obtain a palindrome (99999999).

It can be divided in two parts, 4210101 and 23, that added together give a palindrome (4210124).

The spelling of 421010123 in words is "four hundred twenty-one million, ten thousand, one hundred twenty-three".