211061105056 has 48 divisors (see below), whose sum is σ = 425491466400. Its totient is φ = 103003262208.

The previous prime is 211061105041. The next prime is 211061105063. The reversal of 211061105056 is 650501160112.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1912635 + ... + 2019973.

It is an arithmetic number, because the mean of its divisors is an integer number (8864405550).

Almost surely, 2^211061105056 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 211061105056, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (212745733200).

211061105056 is an abundant number, since it is smaller than the sum of its proper divisors (214430361344).

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

211061105056 is a wasteful number, since it uses less digits than its factorization.

211061105056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 108821 (or 108813 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 28.

Adding to 211061105056 its reverse (650501160112), we get a palindrome (861562265168).

The spelling of 211061105056 in words is "two hundred eleven billion, sixty-one million, one hundred five thousand, fifty-six".