210211220220 has 24 divisors (see below), whose sum is σ = 588591416784. Its totient is φ = 56056325376.

The previous prime is 210211220203. The next prime is 210211220239. The reversal of 210211220220 is 22022112012.

210211220220 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 210211220220.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1751760109 + ... + 1751760228.

It is an arithmetic number, because the mean of its divisors is an integer number (24524642366).

Almost surely, 2^210211220220 is an apocalyptic number.

210211220220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

210211220220 is an abundant number, since it is smaller than the sum of its proper divisors (378380196564).

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

210211220220 is a wasteful number, since it uses less digits than its factorization.

210211220220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3503520349 (or 3503520347 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 210211220220 its reverse (22022112012), we get a palindrome (232233332232).

The spelling of 210211220220 in words is "two hundred ten billion, two hundred eleven million, two hundred twenty thousand, two hundred twenty".