21120212011133 has 2 divisors, whose sum is σ = 21120212011134. Its totient is φ = 21120212011132.

The previous prime is 21120212011109. The next prime is 21120212011139. The reversal of 21120212011133 is 33111021202112.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 21115614899929 + 4597111204 = 4595173^2 + 67802^2 .

It is a cyclic number.

It is not a de Polignac number, because 21120212011133 - 2¹⁶ = 21120211945597 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21120212011139) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10560106005566 + 10560106005567.

It is an arithmetic number, because the mean of its divisors is an integer number (10560106005567).

Almost surely, 2^{21120212011133} is an apocalyptic number.

It is an amenable number.

21120212011133 is a deficient number, since it is larger than the sum of its proper divisors (1).

21120212011133 is an equidigital number, since it uses as much as digits as its factorization.

21120212011133 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 144, while the sum is 20.

Adding to 21120212011133 its reverse (33111021202112), we get a palindrome (54231233213245).

The spelling of 21120212011133 in words is "twenty-one trillion, one hundred twenty billion, two hundred twelve million, eleven thousand, one hundred thirty-three".