320220121021985 has 16 divisors (see below), whose sum is σ = 384908535792000. Its totient is φ = 255746509514496.

The previous prime is 320220121021961. The next prime is 320220121022003. The reversal of 320220121021985 is 589120121022023.

It is a cyclic number.

It is not a de Polignac number, because 320220121021985 - 2⁴⁸ = 38745144311329 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, 507304142 + ... + 507934968.

It is an arithmetic number, because the mean of its divisors is an integer number (24056783487000).

Almost surely, 2^{320220121021985} is an apocalyptic number.

It is an amenable number.

320220121021985 is a deficient number, since it is larger than the sum of its proper divisors (64688414770015).

320220121021985 is a wasteful number, since it uses less digits than its factorization.

320220121021985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 800920.

The product of its (nonzero) digits is 34560, while the sum is 38.

Adding to 320220121021985 its sum of digits (38), we get a palindrome (320220121022023).

The spelling of 320220121021985 in words is "three hundred twenty trillion, two hundred twenty billion, one hundred twenty-one million, twenty-one thousand, nine hundred eighty-five".