21200020222220 has 48 divisors (see below), whose sum is σ = 50882871724608. Its totient is φ = 7268175048960.

The previous prime is 21200020222187. The next prime is 21200020222261. The reversal of 21200020222220 is 2222202000212.

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 15 ways as a sum of consecutive naturals, for example, 1663607 + ... + 6720686.

It is an arithmetic number, because the mean of its divisors is an integer number (1060059827596).

Almost surely, 2^{21200020222220} is an apocalyptic number.

21200020222220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21200020222220 is an abundant number, since it is smaller than the sum of its proper divisors (29682851502388).

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

21200020222220 is a wasteful number, since it uses less digits than its factorization.

21200020222220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8402370 (or 8402368 counting only the distinct ones).

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

Adding to 21200020222220 its reverse (2222202000212), we get a palindrome (23422222222432).

The spelling of 21200020222220 in words is "twenty-one trillion, two hundred billion, twenty million, two hundred twenty-two thousand, two hundred twenty".