321120507 has 4 divisors (see below), whose sum is σ = 428160680. Its totient is φ = 214080336.

The previous prime is 321120493. The next prime is 321120557. The reversal of 321120507 is 705021123.

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

It is not a de Polignac number, because 321120507 - 2⁴ = 321120491 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (321120557) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 53520082 + ... + 53520087.

It is an arithmetic number, because the mean of its divisors is an integer number (107040170).

Almost surely, 2^321120507 is an apocalyptic number.

321120507 is a deficient number, since it is larger than the sum of its proper divisors (107040173).

321120507 is a wasteful number, since it uses less digits than its factorization.

321120507 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 107040172.

The product of its (nonzero) digits is 420, while the sum is 21.

The square root of 321120507 is about 17919.8355740224. The cubic root of 321120507 is about 684.7877986567.

The spelling of 321120507 in words is "three hundred twenty-one million, one hundred twenty thousand, five hundred seven".