123342131 has 4 divisors (see below), whose sum is σ = 134555064. Its totient is φ = 112129200.

The previous prime is 123342101. The next prime is 123342137. The reversal of 123342131 is 131243321.

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

It is a cyclic number.

It is not a de Polignac number, because 123342131 - 2¹⁸ = 123079987 is a prime.

It is a super-2 number, since 2×123342131² = 30426562559242322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (123342137) 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, 5606450 + ... + 5606471.

It is an arithmetic number, because the mean of its divisors is an integer number (33638766).

Almost surely, 2^123342131 is an apocalyptic number.

123342131 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

123342131 is a deficient number, since it is larger than the sum of its proper divisors (11212933).

123342131 is a wasteful number, since it uses less digits than its factorization.

123342131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11212932.

The product of its digits is 432, while the sum is 20.

The square root of 123342131 is about 11105.9502520046. The cubic root of 123342131 is about 497.7796628002.

Adding to 123342131 its reverse (131243321), we get a palindrome (254585452).

The spelling of 123342131 in words is "one hundred twenty-three million, three hundred forty-two thousand, one hundred thirty-one".