321145121 has 4 divisors (see below), whose sum is σ = 350340144. Its totient is φ = 291950100.

The previous prime is 321145109. The next prime is 321145127. The reversal of 321145121 is 121541123.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 321145121 - 2¹⁸ = 320882977 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 321145093 and 321145102.

It is not an unprimeable number, because it can be changed into a prime (321145127) 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, 14597495 + ... + 14597516.

It is an arithmetic number, because the mean of its divisors is an integer number (87585036).

Almost surely, 2^321145121 is an apocalyptic number.

It is an amenable number.

321145121 is a deficient number, since it is larger than the sum of its proper divisors (29195023).

321145121 is a wasteful number, since it uses less digits than its factorization.

321145121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29195022.

The product of its digits is 240, while the sum is 20.

The square root of 321145121 is about 17920.5223417176. The cubic root of 321145121 is about 684.8052946184.

Adding to 321145121 its reverse (121541123), we get a palindrome (442686244).

The spelling of 321145121 in words is "three hundred twenty-one million, one hundred forty-five thousand, one hundred twenty-one".