20021022220221 has 48 divisors (see below), whose sum is σ = 31856121548160. Its totient is φ = 12015562757760.

The previous prime is 20021022220201. The next prime is 20021022220231. The reversal of 20021022220221 is 12202222012002.

20021022220221 is a `hidden beast` number, since 200 + 2 + 1 + 0 + 22 + 220 + 221 = 666.

It is not a de Polignac number, because 20021022220221 - 2¹³ = 20021022212029 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 20021022220194 and 20021022220203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20021022220201) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 305030835 + ... + 305096463.

It is an arithmetic number, because the mean of its divisors is an integer number (663669198920).

Almost surely, 2^{20021022220221} is an apocalyptic number.

It is an amenable number.

20021022220221 is a deficient number, since it is larger than the sum of its proper divisors (11835099327939).

20021022220221 is a wasteful number, since it uses less digits than its factorization.

20021022220221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 95666 (or 95663 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 18.

Adding to 20021022220221 its reverse (12202222012002), we get a palindrome (32223244232223).

The spelling of 20021022220221 in words is "twenty trillion, twenty-one billion, twenty-two million, two hundred twenty thousand, two hundred twenty-one".