20021222022021 has 24 divisors (see below), whose sum is σ = 31548894511680. Its totient is φ = 12133957708800.

The previous prime is 20021222022013. The next prime is 20021222022089. The reversal of 20021222022021 is 12022022212002.

20021222022021 is a `hidden beast` number, since 200 + 2 + 1 + 2 + 220 + 220 + 21 = 666.

It is not a de Polignac number, because 20021222022021 - 2³ = 20021222022013 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20021222021985 and 20021222022003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20021222024021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 10047045 + ... + 11873733.

It is an arithmetic number, because the mean of its divisors is an integer number (1314537271320).

Almost surely, 2^{20021222022021} is an apocalyptic number.

It is an amenable number.

20021222022021 is a deficient number, since it is larger than the sum of its proper divisors (11527672489659).

20021222022021 is a wasteful number, since it uses less digits than its factorization.

20021222022021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1937417 (or 1937414 counting only the distinct ones).

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

Adding to 20021222022021 its reverse (12022022212002), we get a palindrome (32043244234023).

The spelling of 20021222022021 in words is "twenty trillion, twenty-one billion, two hundred twenty-two million, twenty-two thousand, twenty-one".