20020002120221 has 4 divisors (see below), whose sum is σ = 20075768143200. Its totient is φ = 19964236097244.

The previous prime is 20020002120191. The next prime is 20020002120227. The reversal of 20020002120221 is 12202120002002.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 20020002120221 - 2³⁸ = 19745124213277 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 = 20020002120196 and 20020002120205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20020002120227) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27883010951 + ... + 27883011668.

It is an arithmetic number, because the mean of its divisors is an integer number (5018942035800).

Almost surely, 2^{20020002120221} is an apocalyptic number.

It is an amenable number.

20020002120221 is a deficient number, since it is larger than the sum of its proper divisors (55766022979).

20020002120221 is an equidigital number, since it uses as much as digits as its factorization.

20020002120221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55766022978.

The product of its (nonzero) digits is 64, while the sum is 14.

Adding to 20020002120221 its reverse (12202120002002), we get a palindrome (32222122122223).

The spelling of 20020002120221 in words is "twenty trillion, twenty billion, two million, one hundred twenty thousand, two hundred twenty-one".