21110112021133 has 2 divisors, whose sum is σ = 21110112021134. Its totient is φ = 21110112021132.

The previous prime is 21110112021109. The next prime is 21110112021293. The reversal of 21110112021133 is 33112021101112.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 21110009160969 + 102860164 = 4594563^2 + 10142^2 .

It is a cyclic number.

It is not a de Polignac number, because 21110112021133 - 2⁵ = 21110112021101 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21110112021133.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21110112021433) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10555056010566 + 10555056010567.

It is an arithmetic number, because the mean of its divisors is an integer number (10555056010567).

Almost surely, 2^{21110112021133} is an apocalyptic number.

It is an amenable number.

21110112021133 is a deficient number, since it is larger than the sum of its proper divisors (1).

21110112021133 is an equidigital number, since it uses as much as digits as its factorization.

21110112021133 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72, while the sum is 19.

Adding to 21110112021133 its reverse (33112021101112), we get a palindrome (54222133122245).

The spelling of 21110112021133 in words is "twenty-one trillion, one hundred ten billion, one hundred twelve million, twenty-one thousand, one hundred thirty-three".