123210131 has 4 divisors (see below), whose sum is σ = 134411064. Its totient is φ = 112009200.

The previous prime is 123210121. The next prime is 123210133. The reversal of 123210131 is 131012321.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 131012321 = 11 ⋅11910211.

It is a cyclic number.

It is not a de Polignac number, because 123210131 - 2²⁶ = 56101267 is a prime.

It is a super-2 number, since 2×123210131² = 30361472762074322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (123210133) 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, 5600450 + ... + 5600471.

It is an arithmetic number, because the mean of its divisors is an integer number (33602766).

Almost surely, 2^123210131 is an apocalyptic number.

123210131 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

123210131 is a deficient number, since it is larger than the sum of its proper divisors (11200933).

123210131 is a wasteful number, since it uses less digits than its factorization.

123210131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11200932.

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

The square root of 123210131 is about 11100.0059008993. The cubic root of 123210131 is about 497.6020258251.

Adding to 123210131 its reverse (131012321), we get a palindrome (254222452).

The spelling of 123210131 in words is "one hundred twenty-three million, two hundred ten thousand, one hundred thirty-one".