120021109999 has 16 divisors (see below), whose sum is σ = 139511863296. Its totient is φ = 101125180800.

The previous prime is 120021109993. The next prime is 120021110023. The reversal of 120021109999 is 999901120021.

It is a de Polignac number, because none of the positive numbers 2^k-120021109999 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 (120021109993) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 190807 + ... + 525784.

It is an arithmetic number, because the mean of its divisors is an integer number (8719491456).

Almost surely, 2^120021109999 is an apocalyptic number.

120021109999 is a deficient number, since it is larger than the sum of its proper divisors (19490753297).

120021109999 is an equidigital number, since it uses as much as digits as its factorization.

120021109999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 717006.

The product of its (nonzero) digits is 26244, while the sum is 43.

The spelling of 120021109999 in words is "one hundred twenty billion, twenty-one million, one hundred nine thousand, nine hundred ninety-nine".