211101010220 has 48 divisors (see below), whose sum is σ = 459920795040. Its totient is φ = 81293635584.

The previous prime is 211101010199. The next prime is 211101010261. The reversal of 211101010220 is 22010101112.

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 15 ways as a sum of consecutive naturals, for example, 323189 + ... + 725708.

It is an arithmetic number, because the mean of its divisors is an integer number (9581683230).

Almost surely, 2^211101010220 is an apocalyptic number.

211101010220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

211101010220 is an abundant number, since it is smaller than the sum of its proper divisors (248819784820).

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

211101010220 is a wasteful number, since it uses less digits than its factorization.

211101010220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1049282 (or 1049280 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 211101010220 its reverse (22010101112), we get a palindrome (233111111332).

The spelling of 211101010220 in words is "two hundred eleven billion, one hundred one million, ten thousand, two hundred twenty".