20020221022221 has 72 divisors (see below), whose sum is σ = 33983402865048. Its totient is φ = 11323216800000.

The previous prime is 20020221022099. The next prime is 20020221022259. The reversal of 20020221022221 is 12222012202002.

20020221022221 is a `hidden beast` number, since 200 + 2 + 0 + 221 + 0 + 22 + 221 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 9399068324100 + 10621152698121 = 3065790^2 + 3259011^2 .

It is not a de Polignac number, because 20020221022221 - 2⁹ = 20020221021709 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20020221022194 and 20020221022203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20020271022221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 141614271 + ... + 141755571.

It is an arithmetic number, because the mean of its divisors is an integer number (471991706459).

Almost surely, 2^{20020221022221} is an apocalyptic number.

20020221022221 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

20020221022221 is a deficient number, since it is larger than the sum of its proper divisors (13963181842827).

20020221022221 is a wasteful number, since it uses less digits than its factorization.

20020221022221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 144603 (or 144593 counting only the distinct ones).

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

Adding to 20020221022221 its reverse (12222012202002), we get a palindrome (32242233224223).

The spelling of 20020221022221 in words is "twenty trillion, twenty billion, two hundred twenty-one million, twenty-two thousand, two hundred twenty-one".