211246021056 has 224 divisors, whose sum is σ = 660518993920. Its totient is φ = 58307558400.

The previous prime is 211246021043. The next prime is 211246021079. The reversal of 211246021056 is 650120642112.

It is a tau number, because it is divible by the number of its divisors (224).

It is a congruent number.

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, 25785921 + ... + 25794111.

Almost surely, 2^211246021056 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 211246021056, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (330259496960).

211246021056 is an abundant number, since it is smaller than the sum of its proper divisors (449272972864).

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

211246021056 is a wasteful number, since it uses less digits than its factorization.

211246021056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8863 (or 8853 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 30.

Adding to 211246021056 its reverse (650120642112), we get a palindrome (861366663168).

The spelling of 211246021056 in words is "two hundred eleven billion, two hundred forty-six million, twenty-one thousand, fifty-six".