220020021021021 has 12 divisors (see below), whose sum is σ = 317662042184928. Its totient is φ = 135396936012624.

The previous prime is 220020021020963. The next prime is 220020021021029. The reversal of 220020021021021 is 120120120020022.

It is not a de Polignac number, because 220020021021021 - 2¹⁸ = 220020020758877 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220020021021029) 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 11 ways as a sum of consecutive naturals, for example, 216982268745 + ... + 216982269758.

It is an arithmetic number, because the mean of its divisors is an integer number (26471836848744).

Almost surely, 2^{220020021021021} is an apocalyptic number.

It is an amenable number.

220020021021021 is a deficient number, since it is larger than the sum of its proper divisors (97642021163907).

220020021021021 is a wasteful number, since it uses less digits than its factorization.

220020021021021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 433964538532 (or 433964538519 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 220020021021021 its reverse (120120120020022), we get a palindrome (340140141041043).

The spelling of 220020021021021 in words is "two hundred twenty trillion, twenty billion, twenty-one million, twenty-one thousand, twenty-one".