120000020021 has 8 divisors (see below), whose sum is σ = 137209697664. Its totient is φ = 102807046800.

The previous prime is 120000020009. The next prime is 120000020047. The reversal of 120000020021 is 120020000021.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 120000020021 - 2²⁶ = 119932911157 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 120000019990 and 120000020008.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120000020081) 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 7 ways as a sum of consecutive naturals, for example, 4160705 + ... + 4189446.

It is an arithmetic number, because the mean of its divisors is an integer number (17151212208).

Almost surely, 2^120000020021 is an apocalyptic number.

It is an amenable number.

120000020021 is a deficient number, since it is larger than the sum of its proper divisors (17209677643).

120000020021 is an equidigital number, since it uses as much as digits as its factorization.

120000020021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8352211.

The product of its (nonzero) digits is 8, while the sum is 8.

Adding to 120000020021 its reverse (120020000021), we get a palindrome (240020020042).

The spelling of 120000020021 in words is "one hundred twenty billion, twenty thousand, twenty-one".