210111211121112 has 384 divisors, whose sum is σ = 719067727872000. Its totient is φ = 54039232684800.

The previous prime is 210111211121083. The next prime is 210111211121113. The reversal of 210111211121112 is 211121112111012.

210111211121112 is a `hidden beast` number, since 210 + 1 + 11 + 211 + 121 + 112 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (210111211121113) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 30098589 + ... + 36416307.

It is an arithmetic number, because the mean of its divisors is an integer number (1872572208000).

Almost surely, 2^{210111211121112} 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 210111211121112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (359533863936000).

210111211121112 is an abundant number, since it is smaller than the sum of its proper divisors (508956516750888).

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

210111211121112 is a wasteful number, since it uses less digits than its factorization.

210111211121112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6317931 (or 6317924 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 18.

Adding to 210111211121112 its reverse (211121112111012), we get a palindrome (421232323232124).

The spelling of 210111211121112 in words is "two hundred ten trillion, one hundred eleven billion, two hundred eleven million, one hundred twenty-one thousand, one hundred twelve".