123102131 has 4 divisors (see below), whose sum is σ = 126104664. Its totient is φ = 120099600.

The previous prime is 123102113. The next prime is 123102149. The reversal of 123102131 is 131201321.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 131201321 = 739 ⋅177539.

It is an interprime number because it is at equal distance from previous prime (123102113) and next prime (123102149).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-123102131 is a prime.

It is a super-2 number, since 2×123102131² = 30308269313482322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (123102181) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1501205 + ... + 1501286.

It is an arithmetic number, because the mean of its divisors is an integer number (31526166).

Almost surely, 2^123102131 is an apocalyptic number.

123102131 is a deficient number, since it is larger than the sum of its proper divisors (3002533).

123102131 is an equidigital number, since it uses as much as digits as its factorization.

123102131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3002532.

The product of its (nonzero) digits is 36, while the sum is 14.

The square root of 123102131 is about 11095.1399720779. The cubic root of 123102131 is about 497.4565920899.

Adding to 123102131 its reverse (131201321), we get a palindrome (254303452).

It can be divided in two parts, 12310 and 2131, that added together give a palindrome (14441).

The spelling of 123102131 in words is "one hundred twenty-three million, one hundred two thousand, one hundred thirty-one".