21130323231133 has 2 divisors, whose sum is σ = 21130323231134. Its totient is φ = 21130323231132.

The previous prime is 21130323231107. The next prime is 21130323231167. The reversal of 21130323231133 is 33113232303112.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20080768058649 + 1049555172484 = 4481157^2 + 1024478^2 .

It is a cyclic number.

It is not a de Polignac number, because 21130323231133 - 2³⁷ = 20992884277661 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21130323231103) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10565161615566 + 10565161615567.

It is an arithmetic number, because the mean of its divisors is an integer number (10565161615567).

Almost surely, 2^{21130323231133} is an apocalyptic number.

It is an amenable number.

21130323231133 is a deficient number, since it is larger than the sum of its proper divisors (1).

21130323231133 is an equidigital number, since it uses as much as digits as its factorization.

21130323231133 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5832, while the sum is 28.

Adding to 21130323231133 its reverse (33113232303112), we get a palindrome (54243555534245).

The spelling of 21130323231133 in words is "twenty-one trillion, one hundred thirty billion, three hundred twenty-three million, two hundred thirty-one thousand, one hundred thirty-three".