20021112120221 has 8 divisors (see below), whose sum is σ = 20686176969984. Its totient is φ = 19366688308240.

The previous prime is 20021112120209. The next prime is 20021112120241. The reversal of 20021112120221 is 12202121112002.

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 20021112120221 - 2³⁰ = 20020038378397 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 20021112120221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20021112120241) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2660255621 + ... + 2660263146.

It is an arithmetic number, because the mean of its divisors is an integer number (2585772121248).

Almost surely, 2^{20021112120221} is an apocalyptic number.

It is an amenable number.

20021112120221 is a deficient number, since it is larger than the sum of its proper divisors (665064849763).

20021112120221 is an equidigital number, since it uses as much as digits as its factorization.

20021112120221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5320518891.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 20021112120221 its reverse (12202121112002), we get a palindrome (32223233232223).

The spelling of 20021112120221 in words is "twenty trillion, twenty-one billion, one hundred twelve million, one hundred twenty thousand, two hundred twenty-one".