123132111 has 4 divisors (see below), whose sum is σ = 164176152. Its totient is φ = 82088072.

The previous prime is 123132109. The next prime is 123132137. The reversal of 123132111 is 111231321.

It is a happy number.

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 123132111 - 2¹ = 123132109 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123132101) 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 3 ways as a sum of consecutive naturals, for example, 20522016 + ... + 20522021.

It is an arithmetic number, because the mean of its divisors is an integer number (41044038).

Almost surely, 2^123132111 is an apocalyptic number.

123132111 is a deficient number, since it is larger than the sum of its proper divisors (41044041).

123132111 is an equidigital number, since it uses as much as digits as its factorization.

123132111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41044040.

The product of its digits is 36, while the sum is 15.

The square root of 123132111 is about 11096.4909318216. The cubic root of 123132111 is about 497.4969719436.

Adding to 123132111 its reverse (111231321), we get a palindrome (234363432).

It can be divided in two parts, 1231321 and 11, that multiplied together give a palindrome (13544531).

The spelling of 123132111 in words is "one hundred twenty-three million, one hundred thirty-two thousand, one hundred eleven".