210221220000020 has 48 divisors (see below), whose sum is σ = 458223063707136. Its totient is φ = 80926365168000.

The previous prime is 210221219999963. The next prime is 210221220000023. The reversal of 210221220000020 is 20000022122012.

It is a super-2 number, since 2×210221220000020² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (210221220000023) 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 15 ways as a sum of consecutive naturals, for example, 936535526 + ... + 936759965.

It is an arithmetic number, because the mean of its divisors is an integer number (9546313827232).

Almost surely, 2^{210221220000020} is an apocalyptic number.

210221220000020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

210221220000020 is an abundant number, since it is smaller than the sum of its proper divisors (248001843707116).

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

210221220000020 is a wasteful number, since it uses less digits than its factorization.

210221220000020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1873295712 (or 1873295710 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 14.

Adding to 210221220000020 its reverse (20000022122012), we get a palindrome (230221242122032).

The spelling of 210221220000020 in words is "two hundred ten trillion, two hundred twenty-one billion, two hundred twenty million, twenty", and thus it is an aban number.