321132121 has 8 divisors (see below), whose sum is σ = 328099784. Its totient is φ = 314219520.

The previous prime is 321132047. The next prime is 321132137. The reversal of 321132121 is 121231123.

It can be written as a sum of positive squares in 4 ways, for example, as 12638025 + 308494096 = 3555^2 + 17564^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 321132121 - 2⁹ = 321131609 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 321132095 and 321132104.

It is not an unprimeable number, because it can be changed into a prime (321132151) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1866 + ... + 25411.

It is an arithmetic number, because the mean of its divisors is an integer number (41012473).

Almost surely, 2^321132121 is an apocalyptic number.

It is an amenable number.

321132121 is a deficient number, since it is larger than the sum of its proper divisors (6967663).

321132121 is a wasteful number, since it uses less digits than its factorization.

321132121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27531.

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

The square root of 321132121 is about 17920.1596254051. The cubic root of 321132121 is about 684.7960541553.

Adding to 321132121 its reverse (121231123), we get a palindrome (442363244).

The spelling of 321132121 in words is "three hundred twenty-one million, one hundred thirty-two thousand, one hundred twenty-one".