21112012220112 has 60 divisors (see below), whose sum is σ = 64455613070784. Its totient is φ = 6397579460160.

The previous prime is 21112012220111. The next prime is 21112012220177. The reversal of 21112012220112 is 21102221021112.

21112012220112 is a `hidden beast` number, since 211 + 120 + 1 + 2 + 220 + 112 = 666.

It is a super-3 number, since 3×21112012220112³ (a number of 41 digits) contains 333 as substring.

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 (21112012220111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6664143688 + ... + 6664146855.

Almost surely, 2^{21112012220112} is an apocalyptic number.

21112012220112 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

21112012220112 is an abundant number, since it is smaller than the sum of its proper divisors (43343600850672).

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

21112012220112 is a wasteful number, since it uses less digits than its factorization.

21112012220112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13328290568 (or 13328290559 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 21112012220112 its reverse (21102221021112), we get a palindrome (42214233241224).

The spelling of 21112012220112 in words is "twenty-one trillion, one hundred twelve billion, twelve million, two hundred twenty thousand, one hundred twelve".