21120300112 has 20 divisors (see below), whose sum is σ = 40939584436. Its totient is φ = 10555246080.

The previous prime is 21120300107. The next prime is 21120300133. The reversal of 21120300112 is 21100302112.

It can be written as a sum of positive squares in 2 ways, for example, as 8588840976 + 12531459136 = 92676^2 + 111944^2 .

It is a junction number, because it is equal to n+sod(n) for n = 21120300092 and 21120300101.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 270843 + ... + 339994.

Almost surely, 2^21120300112 is an apocalyptic number.

It is an amenable number.

21120300112 is a deficient number, since it is larger than the sum of its proper divisors (19819284324).

21120300112 is a wasteful number, since it uses less digits than its factorization.

21120300112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 613006 (or 613000 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 13.

Adding to 21120300112 its reverse (21100302112), we get a palindrome (42220602224).

The spelling of 21120300112 in words is "twenty-one billion, one hundred twenty million, three hundred thousand, one hundred twelve".