321120506 has 16 divisors (see below), whose sum is σ = 568250880. Its totient is φ = 133183440.

The previous prime is 321120493. The next prime is 321120557. The reversal of 321120506 is 605021123.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 369521 + ... + 370388.

It is an arithmetic number, because the mean of its divisors is an integer number (35515680).

Almost surely, 2^321120506 is an apocalyptic number.

321120506 is a deficient number, since it is larger than the sum of its proper divisors (247130374).

321120506 is a wasteful number, since it uses less digits than its factorization.

321120506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 739949.

The product of its (nonzero) digits is 360, while the sum is 20.

The square root of 321120506 is about 17919.8355461204. The cubic root of 321120506 is about 684.7877979459.

Adding to 321120506 its reverse (605021123), we get a palindrome (926141629).

The spelling of 321120506 in words is "three hundred twenty-one million, one hundred twenty thousand, five hundred six".