123100133 has 4 divisors (see below), whose sum is σ = 132569388. Its totient is φ = 113630880.

The previous prime is 123100129. The next prime is 123100139. The reversal of 123100133 is 331001321.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 46485124 + 76615009 = 6818^2 + 8753^2 .

It is a cyclic number.

It is not a de Polignac number, because 123100133 - 2² = 123100129 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123100139) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4734608 + ... + 4734633.

It is an arithmetic number, because the mean of its divisors is an integer number (33142347).

Almost surely, 2^123100133 is an apocalyptic number.

123100133 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

123100133 is a deficient number, since it is larger than the sum of its proper divisors (9469255).

123100133 is an equidigital number, since it uses as much as digits as its factorization.

123100133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9469254.

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

The square root of 123100133 is about 11095.0499322896. The cubic root of 123100133 is about 497.4539007646.

Adding to 123100133 its reverse (331001321), we get a palindrome (454101454).

The spelling of 123100133 in words is "one hundred twenty-three million, one hundred thousand, one hundred thirty-three".