221020202020002 has 64 divisors (see below), whose sum is σ = 558664833798144. Its totient is φ = 56621435840640.

The previous prime is 221020202019973. The next prime is 221020202020021. The reversal of 221020202020002 is 200020202020122.

It is a super-2 number, since 2×221020202020002² (a number of 29 digits) contains 22 as substring.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 3276669738 + ... + 3276737189.

It is an arithmetic number, because the mean of its divisors is an integer number (8729138028096).

Almost surely, 2^{221020202020002} is an apocalyptic number.

221020202020002 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

221020202020002 is an abundant number, since it is smaller than the sum of its proper divisors (337644631778142).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

221020202020002 is a wasteful number, since it uses less digits than its factorization.

221020202020002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6553407023.

The product of its (nonzero) digits is 128, while the sum is 15.

Adding to 221020202020002 its reverse (200020202020122), we get a palindrome (421040404040124).

The spelling of 221020202020002 in words is "two hundred twenty-one trillion, twenty billion, two hundred two million, twenty thousand, two".