20020222112221 has 4 divisors (see below), whose sum is σ = 20020261291744. Its totient is φ = 20020182932700.

The previous prime is 20020222112201. The next prime is 20020222112243. The reversal of 20020222112221 is 12221122202002.

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 20020222112221 - 2¹¹ = 20020222110173 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 (20020222112201) 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, 18813015 + ... + 19848676.

It is an arithmetic number, because the mean of its divisors is an integer number (5005065322936).

Almost surely, 2^{20020222112221} is an apocalyptic number.

It is an amenable number.

20020222112221 is a deficient number, since it is larger than the sum of its proper divisors (39179523).

20020222112221 is an equidigital number, since it uses as much as digits as its factorization.

20020222112221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39179522.

The product of its (nonzero) digits is 256, while the sum is 19.

Adding to 20020222112221 its reverse (12221122202002), we get a palindrome (32241344314223).

The spelling of 20020222112221 in words is "twenty trillion, twenty billion, two hundred twenty-two million, one hundred twelve thousand, two hundred twenty-one".