21000112210112 has 112 divisors (see below), whose sum is σ = 48443114704128. Its totient is φ = 8845718123520.

The previous prime is 21000112210111. The next prime is 21000112210117. The reversal of 21000112210112 is 21101221100012.

It is a tau number, because it is divible by the number of its divisors (112).

It is a Harshad number since it is a multiple of its sum of digits (14).

It is not an unprimeable number, because it can be changed into a prime (21000112210111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 35423723 + ... + 36011669.

Almost surely, 2^{21000112210112} 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 21000112210112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24221557352064).

21000112210112 is an abundant number, since it is smaller than the sum of its proper divisors (27443002494016).

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

21000112210112 is a wasteful number, since it uses less digits than its factorization.

21000112210112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 589334 (or 589324 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 21000112210112 its reverse (21101221100012), we get a palindrome (42101333310124).

The spelling of 21000112210112 in words is "twenty-one trillion, one hundred twelve million, two hundred ten thousand, one hundred twelve".