211210021100220 has 96 divisors (see below), whose sum is σ = 602558486913600. Its totient is φ = 55258864926720.

The previous prime is 211210021100219. The next prime is 211210021100279. The reversal of 211210021100220 is 22001120012112.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 211210021100220.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 163192206 + ... + 164481354.

It is an arithmetic number, because the mean of its divisors is an integer number (6276650905350).

Almost surely, 2^{211210021100220} is an apocalyptic number.

211210021100220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

211210021100220 is an abundant number, since it is smaller than the sum of its proper divisors (391348465813380).

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

211210021100220 is a wasteful number, since it uses less digits than its factorization.

211210021100220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1340735 (or 1340733 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 211210021100220 its reverse (22001120012112), we get a palindrome (233211141112332).

The spelling of 211210021100220 in words is "two hundred eleven trillion, two hundred ten billion, twenty-one million, one hundred thousand, two hundred twenty".