21022120211112 has 128 divisors (see below), whose sum is σ = 61853492160000. Its totient is φ = 6592644108288.

The previous prime is 21022120211101. The next prime is 21022120211149. The reversal of 21022120211112 is 21111202122012.

21022120211112 is a `hidden beast` number, since 210 + 221 + 20 + 211 + 1 + 1 + 2 = 666.

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 8483089 + ... + 10677407.

It is an arithmetic number, because the mean of its divisors is an integer number (483230407500).

Almost surely, 2^{21022120211112} 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 21022120211112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30926746080000).

21022120211112 is an abundant number, since it is smaller than the sum of its proper divisors (40831371948888).

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

21022120211112 is a wasteful number, since it uses less digits than its factorization.

21022120211112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2196960 (or 2196950 counting only the distinct ones).

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

Adding to 21022120211112 its reverse (21111202122012), we get a palindrome (42133322333124).

The spelling of 21022120211112 in words is "twenty-one trillion, twenty-two billion, one hundred twenty million, two hundred eleven thousand, one hundred twelve".