211111220000 has 60 divisors (see below), whose sum is σ = 519365317086. Its totient is φ = 84444480000.

The previous prime is 211111219993. The next prime is 211111220039. The reversal of 211111220000 is 22111112.

It can be written as a sum of positive squares in 5 ways, for example, as 27005006224 + 184106213776 = 164332^2 + 429076^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 5257781 + ... + 5297780.

Almost surely, 2^211111220000 is an apocalyptic number.

211111220000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

211111220000 is an abundant number, since it is smaller than the sum of its proper divisors (308254097086).

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

211111220000 is an equidigital number, since it uses as much as digits as its factorization.

211111220000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10555591 (or 10555568 counting only the distinct ones).

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

Adding to 211111220000 its reverse (22111112), we get a palindrome (211133331112).

The spelling of 211111220000 in words is "two hundred eleven billion, one hundred eleven million, two hundred twenty thousand".