100312133 has 2 divisors, whose sum is σ = 100312134. Its totient is φ = 100312132.

The previous prime is 100312129. The next prime is 100312141. The reversal of 100312133 is 331213001.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 99062209 + 1249924 = 9953^2 + 1118^2 .

It is a cyclic number.

It is not a de Polignac number, because 100312133 - 2² = 100312129 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (100312103) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50156066 + 50156067.

It is an arithmetic number, because the mean of its divisors is an integer number (50156067).

Almost surely, 2^100312133 is an apocalyptic number.

It is an amenable number.

100312133 is a deficient number, since it is larger than the sum of its proper divisors (1).

100312133 is an equidigital number, since it uses as much as digits as its factorization.

100312133 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 54, while the sum is 14.

The square root of 100312133 is about 10015.5944905932. The cubic root of 100312133 is about 464.6413127842.

Adding to 100312133 its reverse (331213001), we get a palindrome (431525134).

The spelling of 100312133 in words is "one hundred million, three hundred twelve thousand, one hundred thirty-three".