321245121 has 4 divisors (see below), whose sum is σ = 428326832. Its totient is φ = 214163412.

The previous prime is 321245069. The next prime is 321245123. The reversal of 321245121 is 121542123.

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 de Polignac number, because none of the positive numbers 2^k-321245121 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (321245123) 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, 53540851 + ... + 53540856.

It is an arithmetic number, because the mean of its divisors is an integer number (107081708).

Almost surely, 2^321245121 is an apocalyptic number.

It is an amenable number.

321245121 is a deficient number, since it is larger than the sum of its proper divisors (107081711).

321245121 is a wasteful number, since it uses less digits than its factorization.

321245121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 107081710.

The product of its digits is 480, while the sum is 21.

The square root of 321245121 is about 17923.3122217965. The cubic root of 321245121 is about 684.8763667685.

Adding to 321245121 its reverse (121542123), we get a palindrome (442787244).

The spelling of 321245121 in words is "three hundred twenty-one million, two hundred forty-five thousand, one hundred twenty-one".