21120210220112 has 20 divisors (see below), whose sum is σ = 41791054266816. Its totient is φ = 10335422022240.

The previous prime is 21120210220013. The next prime is 21120210220121. The reversal of 21120210220112 is 21102201202112.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14042692214 + ... + 14042693717.

Almost surely, 2^{21120210220112} is an apocalyptic number.

It is an amenable number.

21120210220112 is a deficient number, since it is larger than the sum of its proper divisors (20670844046704).

21120210220112 is a wasteful number, since it uses less digits than its factorization.

21120210220112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28085385986 (or 28085385980 counting only the distinct ones).

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

Adding to 21120210220112 its reverse (21102201202112), we get a palindrome (42222411422224).

The spelling of 21120210220112 in words is "twenty-one trillion, one hundred twenty billion, two hundred ten million, two hundred twenty thousand, one hundred twelve".