211021220100210 has 64 divisors (see below), whose sum is σ = 545410892154240. Its totient is φ = 51943475404800.

The previous prime is 211021220100191. The next prime is 211021220100221. The reversal of 211021220100210 is 12001022120112.

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 211021220100210.

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, 110255410 + ... + 112153010.

It is an arithmetic number, because the mean of its divisors is an integer number (8522045189910).

Almost surely, 2^{211021220100210} is an apocalyptic number.

211021220100210 is an abundant number, since it is smaller than the sum of its proper divisors (334389672054030).

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

211021220100210 is a wasteful number, since it uses less digits than its factorization.

211021220100210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2182763.

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

Adding to 211021220100210 its reverse (12001022120112), we get a palindrome (223022242220322).

The spelling of 211021220100210 in words is "two hundred eleven trillion, twenty-one billion, two hundred twenty million, one hundred thousand, two hundred ten".