100312123 has 2 divisors, whose sum is σ = 100312124. Its totient is φ = 100312122.

The previous prime is 100312111. The next prime is 100312129. The reversal of 100312123 is 321213001.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-100312123 is a prime.

It is not a weakly prime, because it can be changed into another prime (100312129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50156061 + 50156062.

It is an arithmetic number, because the mean of its divisors is an integer number (50156062).

Almost surely, 2^100312123 is an apocalyptic number.

100312123 is a deficient number, since it is larger than the sum of its proper divisors (1).

100312123 is an equidigital number, since it uses as much as digits as its factorization.

100312123 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36, while the sum is 13.

The square root of 100312123 is about 10015.5939913717. The cubic root of 100312123 is about 464.6412973444.

Adding to 100312123 its reverse (321213001), we get a palindrome (421525124).

The spelling of 100312123 in words is "one hundred million, three hundred twelve thousand, one hundred twenty-three".