132123121 has 4 divisors (see below), whose sum is σ = 142286452. Its totient is φ = 121959792.

The previous prime is 132123113. The next prime is 132123143. The reversal of 132123121 is 121321231.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 121321231 = 17 ⋅7136543.

It can be written as a sum of positive squares in 2 ways, for example, as 74909025 + 57214096 = 8655^2 + 7564^2 .

It is a cyclic number.

It is not a de Polignac number, because 132123121 - 2³ = 132123113 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 132123095 and 132123104.

It is not an unprimeable number, because it can be changed into a prime (132123181) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5081646 + ... + 5081671.

It is an arithmetic number, because the mean of its divisors is an integer number (35571613).

Almost surely, 2^132123121 is an apocalyptic number.

It is an amenable number.

132123121 is a deficient number, since it is larger than the sum of its proper divisors (10163331).

132123121 is a wasteful number, since it uses less digits than its factorization.

132123121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10163330.

The product of its digits is 72, while the sum is 16.

The square root of 132123121 is about 11494.4821979940. The cubic root of 132123121 is about 509.3225928794.

Adding to 132123121 its reverse (121321231), we get a palindrome (253444352).

It can be divided in two parts, 1321 and 23121, that added together give a palindrome (24442).

The spelling of 132123121 in words is "one hundred thirty-two million, one hundred twenty-three thousand, one hundred twenty-one".