420112123 has 2 divisors, whose sum is σ = 420112124. Its totient is φ = 420112122.

The previous prime is 420112103. The next prime is 420112163. The reversal of 420112123 is 321211024.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-420112123 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 420112097 and 420112106.

It is not a weakly prime, because it can be changed into another prime (420112103) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210056061 + 210056062.

It is an arithmetic number, because the mean of its divisors is an integer number (210056062).

Almost surely, 2^420112123 is an apocalyptic number.

420112123 is a deficient number, since it is larger than the sum of its proper divisors (1).

420112123 is an equidigital number, since it uses as much as digits as its factorization.

420112123 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 420112123 is about 20496.6368704722. The cubic root of 420112123 is about 748.9538736528.

Adding to 420112123 its reverse (321211024), we get a palindrome (741323147).

The spelling of 420112123 in words is "four hundred twenty million, one hundred twelve thousand, one hundred twenty-three".