210122012111112 has 80 divisors (see below), whose sum is σ = 588546214258860. Its totient is φ = 70039477892736.

The previous prime is 210122012111093. The next prime is 210122012111119. The reversal of 210122012111112 is 211111210221012.

It is a happy number.

210122012111112 is a `hidden beast` number, since 210 + 1 + 220 + 1 + 211 + 11 + 12 = 666.

210122012111112 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 183102953654916 + 27019058456196 = 13531554^2 + 5197986^2 .

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

It is not an unprimeable number, because it can be changed into a prime (210122012111119) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 35731878 + ... + 41194794.

Almost surely, 2^{210122012111112} is an apocalyptic number.

It is an amenable number.

210122012111112 is an abundant number, since it is smaller than the sum of its proper divisors (378424202147748).

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

210122012111112 is a wasteful number, since it uses less digits than its factorization.

210122012111112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5522292 (or 5522279 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 18.

Adding to 210122012111112 its reverse (211111210221012), we get a palindrome (421233222332124).

The spelling of 210122012111112 in words is "two hundred ten trillion, one hundred twenty-two billion, twelve million, one hundred eleven thousand, one hundred twelve".