21020222202020 has 48 divisors (see below), whose sum is σ = 44176217272320. Its totient is φ = 8401661259264.

The previous prime is 21020222202019. The next prime is 21020222202071. The reversal of 21020222202020 is 2020222202012.

It is a super-3 number, since 3×21020222202020³ (a number of 41 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 21020222202020.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 403999247 + ... + 404051273.

It is an arithmetic number, because the mean of its divisors is an integer number (920337859840).

Almost surely, 2^{21020222202020} is an apocalyptic number.

21020222202020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21020222202020 is an abundant number, since it is smaller than the sum of its proper divisors (23155995070300).

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

21020222202020 is a wasteful number, since it uses less digits than its factorization.

21020222202020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67092 (or 67090 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 17.

Adding to 21020222202020 its reverse (2020222202012), we get a palindrome (23040444404032).

The spelling of 21020222202020 in words is "twenty-one trillion, twenty billion, two hundred twenty-two million, two hundred two thousand, twenty".