21200211210020 has 48 divisors (see below), whose sum is σ = 44609995819200. Its totient is φ = 8463037749120.

The previous prime is 21200211210001. The next prime is 21200211210043. The reversal of 21200211210020 is 2001211200212.

It is a junction number, because it is equal to n+sod(n) for n = 21200211209977 and 21200211210004.

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, 31095590 + ... + 31770050.

It is an arithmetic number, because the mean of its divisors is an integer number (929374912900).

Almost surely, 2^{21200211210020} is an apocalyptic number.

21200211210020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21200211210020 is an abundant number, since it is smaller than the sum of its proper divisors (23409784609180).

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

21200211210020 is a wasteful number, since it uses less digits than its factorization.

21200211210020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 677628 (or 677626 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 21200211210020 its reverse (2001211200212), we get a palindrome (23201422410232).

The spelling of 21200211210020 in words is "twenty-one trillion, two hundred billion, two hundred eleven million, two hundred ten thousand, twenty".