4012345123 has 2 divisors, whose sum is σ = 4012345124. Its totient is φ = 4012345122.

The previous prime is 4012345111. The next prime is 4012345153. The reversal of 4012345123 is 3215432104.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4012345123 is a prime.

It is not a weakly prime, because it can be changed into another prime (4012345153) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2006172561 + 2006172562.

It is an arithmetic number, because the mean of its divisors is an integer number (2006172562).

Almost surely, 2^4012345123 is an apocalyptic number.

4012345123 is a deficient number, since it is larger than the sum of its proper divisors (1).

4012345123 is an equidigital number, since it uses as much as digits as its factorization.

4012345123 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2880, while the sum is 25.

The square root of 4012345123 is about 63343.0747832784. The cubic root of 4012345123 is about 1589.0324299237.

Adding to 4012345123 its reverse (3215432104), we get a palindrome (7227777227).

The spelling of 4012345123 in words is "four billion, twelve million, three hundred forty-five thousand, one hundred twenty-three".