321140120505 has 16 divisors (see below), whose sum is σ = 536164375680. Its totient is φ = 163828003328.

The previous prime is 321140120471. The next prime is 321140120549. The reversal of 321140120505 is 505021041123.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 321140120505 - 2²⁶ = 321073011641 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 465420120 + ... + 465420809.

It is an arithmetic number, because the mean of its divisors is an integer number (33510273480).

Almost surely, 2^321140120505 is an apocalyptic number.

It is an amenable number.

321140120505 is a deficient number, since it is larger than the sum of its proper divisors (215024255175).

321140120505 is a wasteful number, since it uses less digits than its factorization.

321140120505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 930840960.

The product of its (nonzero) digits is 1200, while the sum is 24.

Adding to 321140120505 its reverse (505021041123), we get a palindrome (826161161628).

The spelling of 321140120505 in words is "three hundred twenty-one billion, one hundred forty million, one hundred twenty thousand, five hundred five".