20002120221021 has 8 divisors (see below), whose sum is σ = 26716364445120. Its totient is φ = 13311311405472.

The previous prime is 20002120221001. The next prime is 20002120221029. The reversal of 20002120221021 is 12012202120002.

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

It is not a de Polignac number, because 20002120221021 - 2¹⁹ = 20002119696733 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20002120221029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5858850145 + ... + 5858853558.

It is an arithmetic number, because the mean of its divisors is an integer number (3339545555640).

Almost surely, 2^{20002120221021} is an apocalyptic number.

It is an amenable number.

20002120221021 is a deficient number, since it is larger than the sum of its proper divisors (6714244224099).

20002120221021 is a wasteful number, since it uses less digits than its factorization.

20002120221021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11717704275.

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 20002120221021 its reverse (12012202120002), we get a palindrome (32014322341023).

The spelling of 20002120221021 in words is "twenty trillion, two billion, one hundred twenty million, two hundred twenty-one thousand, twenty-one".