123100131 has 32 divisors (see below), whose sum is σ = 206553600. Its totient is φ = 63348480.

The previous prime is 123100129. The next prime is 123100139. The reversal of 123100131 is 131001321.

It is not a de Polignac number, because 123100131 - 2¹ = 123100129 is a prime.

It is a super-2 number, since 2×123100131² = 30307284504434322, which contains 22 as substring.

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 31 ways as a sum of consecutive naturals, for example, 22735 + ... + 27623.

It is an arithmetic number, because the mean of its divisors is an integer number (6454800).

Almost surely, 2^123100131 is an apocalyptic number.

123100131 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

123100131 is a deficient number, since it is larger than the sum of its proper divisors (83453469).

123100131 is a wasteful number, since it uses less digits than its factorization.

123100131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5019.

The product of its (nonzero) digits is 18, while the sum is 12.

The square root of 123100131 is about 11095.0498421593. The cubic root of 123100131 is about 497.4538980705.

Adding to 123100131 its reverse (131001321), we get a palindrome (254101452).

It can be divided in two parts, 1 and 23100131, that added together give a palindrome (23100132).

The spelling of 123100131 in words is "one hundred twenty-three million, one hundred thousand, one hundred thirty-one".