3231123121 has 4 divisors (see below), whose sum is σ = 3309931044. Its totient is φ = 3152315200.

The previous prime is 3231123113. The next prime is 3231123143. The reversal of 3231123121 is 1213211323.

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

It can be written as a sum of positive squares in 2 ways, for example, as 1357185600 + 1873937521 = 36840^2 + 43289^2 .

It is a cyclic number.

It is not a de Polignac number, because 3231123121 - 2³ = 3231123113 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3231123151) 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, 39403900 + ... + 39403981.

It is an arithmetic number, because the mean of its divisors is an integer number (827482761).

Almost surely, 2^3231123121 is an apocalyptic number.

It is an amenable number.

3231123121 is a deficient number, since it is larger than the sum of its proper divisors (78807923).

3231123121 is an equidigital number, since it uses as much as digits as its factorization.

3231123121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78807922.

The product of its digits is 216, while the sum is 19.

The square root of 3231123121 is about 56842.9689671467. The cubic root of 3231123121 is about 1478.3746341062.

Adding to 3231123121 its reverse (1213211323), we get a palindrome (4444334444).

The spelling of 3231123121 in words is "three billion, two hundred thirty-one million, one hundred twenty-three thousand, one hundred twenty-one".