21124240320133 has 2 divisors, whose sum is σ = 21124240320134. Its totient is φ = 21124240320132.

The previous prime is 21124240320097. The next prime is 21124240320143. The reversal of 21124240320133 is 33102304242112.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13502405891844 + 7621834428289 = 3674562^2 + 2760767^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21124240320133 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21124240320143) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10562120160066 + 10562120160067.

It is an arithmetic number, because the mean of its divisors is an integer number (10562120160067).

Almost surely, 2^{21124240320133} is an apocalyptic number.

It is an amenable number.

21124240320133 is a deficient number, since it is larger than the sum of its proper divisors (1).

21124240320133 is an equidigital number, since it uses as much as digits as its factorization.

21124240320133 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6912, while the sum is 28.

Adding to 21124240320133 its reverse (33102304242112), we get a palindrome (54226544562245).

The spelling of 21124240320133 in words is "twenty-one trillion, one hundred twenty-four billion, two hundred forty million, three hundred twenty thousand, one hundred thirty-three".