21112220020112 has 80 divisors (see below), whose sum is σ = 44481985137408. Its totient is φ = 9648882086400.

The previous prime is 21112220020103. The next prime is 21112220020153. The reversal of 21112220020112 is 21102002221112.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 623442893 + ... + 623476755.

Almost surely, 2^{21112220020112} 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 21112220020112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22240992568704).

21112220020112 is an abundant number, since it is smaller than the sum of its proper divisors (23369765117296).

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

21112220020112 is a wasteful number, since it uses less digits than its factorization.

21112220020112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63088 (or 63082 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 21112220020112 its reverse (21102002221112), we get a palindrome (42214222241224).

The spelling of 21112220020112 in words is "twenty-one trillion, one hundred twelve billion, two hundred twenty million, twenty thousand, one hundred twelve".