123103012131 has 96 divisors (see below), whose sum is σ = 201347887104. Its totient is φ = 71828736000.

The previous prime is 123103012051. The next prime is 123103012163. The reversal of 123103012131 is 131210301321.

123103012131 is a `hidden beast` number, since 1 + 2 + 310 + 301 + 21 + 31 = 666.

It is not a de Polignac number, because 123103012131 - 2¹⁷ = 123102881059 is a prime.

It is a super-2 number, since 2×123103012131² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (123103012531) 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 95 ways as a sum of consecutive naturals, for example, 142645006 + ... + 142645868.

It is an arithmetic number, because the mean of its divisors is an integer number (2097373824).

Almost surely, 2^123103012131 is an apocalyptic number.

123103012131 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

123103012131 is a deficient number, since it is larger than the sum of its proper divisors (78244874973).

123103012131 is a wasteful number, since it uses less digits than its factorization.

123103012131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1345 (or 1342 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 18.

Adding to 123103012131 its reverse (131210301321), we get a palindrome (254313313452).

The spelling of 123103012131 in words is "one hundred twenty-three billion, one hundred three million, twelve thousand, one hundred thirty-one".