100312111 has 2 divisors, whose sum is σ = 100312112. Its totient is φ = 100312110.

The previous prime is 100312109. The next prime is 100312123. The reversal of 100312111 is 111213001.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 100312111 - 2¹ = 100312109 is a prime.

It is a super-2 number, since 2×100312111² = 20125039226552642, which contains 22 as substring.

Together with 100312109, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (100312141) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50156055 + 50156056.

It is an arithmetic number, because the mean of its divisors is an integer number (50156056).

Almost surely, 2^100312111 is an apocalyptic number.

100312111 is a deficient number, since it is larger than the sum of its proper divisors (1).

100312111 is an equidigital number, since it uses as much as digits as its factorization.

100312111 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6, while the sum is 10.

The square root of 100312111 is about 10015.5933923058. The cubic root of 100312111 is about 464.6412788165.

Adding to 100312111 its reverse (111213001), we get a palindrome (211525112).

The spelling of 100312111 in words is "one hundred million, three hundred twelve thousand, one hundred eleven".