21120112101 has 12 divisors (see below), whose sum is σ = 30952892096. Its totient is φ = 12800067720.

The previous prime is 21120112081. The next prime is 21120112133. The reversal of 21120112101 is 10121102112.

It is not a de Polignac number, because 21120112101 - 2⁶ = 21120112037 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21120112201) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 29090701 + ... + 29091426.

Almost surely, 2^21120112101 is an apocalyptic number.

It is an amenable number.

21120112101 is a deficient number, since it is larger than the sum of its proper divisors (9832779995).

21120112101 is a wasteful number, since it uses less digits than its factorization.

21120112101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58182152 (or 58182141 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 21120112101 its reverse (10121102112), we get a palindrome (31241214213).

It can be divided in two parts, 2112011 and 2101, that added together give a palindrome (2114112).

The spelling of 21120112101 in words is "twenty-one billion, one hundred twenty million, one hundred twelve thousand, one hundred one".