21210322200020 has 48 divisors (see below), whose sum is σ = 46572932181888. Its totient is φ = 8098725613440.

The previous prime is 21210322200017. The next prime is 21210322200037. The reversal of 21210322200020 is 2000222301212.

It is a super-2 number, since 2×21210322200020² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

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, 46728719 + ... + 47180438.

It is an arithmetic number, because the mean of its divisors is an integer number (970269420456).

Almost surely, 2^{21210322200020} is an apocalyptic number.

21210322200020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21210322200020 is an abundant number, since it is smaller than the sum of its proper divisors (25362609981868).

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

21210322200020 is a wasteful number, since it uses less digits than its factorization.

21210322200020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 93909680 (or 93909678 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 17.

Adding to 21210322200020 its reverse (2000222301212), we get a palindrome (23210544501232).

The spelling of 21210322200020 in words is "twenty-one trillion, two hundred ten billion, three hundred twenty-two million, two hundred thousand, twenty".