211021371072 has 168 divisors, whose sum is σ = 637890926400. Its totient is φ = 69147945216.

The previous prime is 211021371017. The next prime is 211021371167. The reversal of 211021371072 is 270173120112.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 802579 + ... + 1032557.

It is an arithmetic number, because the mean of its divisors is an integer number (3796969800).

Almost surely, 2^211021371072 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 211021371072, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (318945463200).

211021371072 is an abundant number, since it is smaller than the sum of its proper divisors (426869555328).

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

211021371072 is an equidigital number, since it uses as much as digits as its factorization.

211021371072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 230065 (or 230043 counting only the distinct ones).

The product of its (nonzero) digits is 1176, while the sum is 27.

Adding to 211021371072 its reverse (270173120112), we get a palindrome (481194491184).

The spelling of 211021371072 in words is "two hundred eleven billion, twenty-one million, three hundred seventy-one thousand, seventy-two".