211021020112 has 80 divisors (see below), whose sum is σ = 478272960000. Its totient is φ = 88307485056.

The previous prime is 211021020097. The next prime is 211021020137. The reversal of 211021020112 is 211020120112.

It is a junction number, because it is equal to n+sod(n) for n = 211021020092 and 211021020101.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28136139 + ... + 28143637.

It is an arithmetic number, because the mean of its divisors is an integer number (5978412000).

Almost surely, 2^211021020112 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 211021020112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (239136480000).

211021020112 is an abundant number, since it is smaller than the sum of its proper divisors (267251939888).

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

211021020112 is a wasteful number, since it uses less digits than its factorization.

211021020112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13400 (or 13394 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 211021020112 its reverse (211020120112), we get a palindrome (422041140224).

The spelling of 211021020112 in words is "two hundred eleven billion, twenty-one million, twenty thousand, one hundred twelve".