220120009999 has 4 divisors (see below), whose sum is σ = 220212850840. Its totient is φ = 220027169160.

The previous prime is 220120009987. The next prime is 220120010023. The reversal of 220120009999 is 999900021022.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-220120009999 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220120009799) 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, 46416864 + ... + 46421605.

It is an arithmetic number, because the mean of its divisors is an integer number (55053212710).

Almost surely, 2^220120009999 is an apocalyptic number.

220120009999 is a deficient number, since it is larger than the sum of its proper divisors (92840841).

220120009999 is an equidigital number, since it uses as much as digits as its factorization.

220120009999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 92840840.

The product of its (nonzero) digits is 52488, while the sum is 43.

The spelling of 220120009999 in words is "two hundred twenty billion, one hundred twenty million, nine thousand, nine hundred ninety-nine".