211021020210 has 192 divisors, whose sum is σ = 683726883840. Its totient is φ = 40475485440.

The previous prime is 211021020209. The next prime is 211021020239. The reversal of 211021020210 is 12020120112.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 120121 + ... + 660659.

It is an arithmetic number, because the mean of its divisors is an integer number (3561077520).

Almost surely, 2^211021020210 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 211021020210, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (341863441920).

211021020210 is an abundant number, since it is smaller than the sum of its proper divisors (472705863630).

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

211021020210 is a wasteful number, since it uses less digits than its factorization.

211021020210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 540593 (or 540580 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 211021020210 its reverse (12020120112), we get a palindrome (223041140322).

The spelling of 211021020210 in words is "two hundred eleven billion, twenty-one million, twenty thousand, two hundred ten".