21102330133 has 2 divisors, whose sum is σ = 21102330134. Its totient is φ = 21102330132.

The previous prime is 21102330091. The next prime is 21102330143. The reversal of 21102330133 is 33103320112.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 21095238564 + 7091569 = 145242^2 + 2663^2 .

It is a cyclic number.

It is not a de Polignac number, because 21102330133 - 2¹⁷ = 21102199061 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21102330133.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21102330143) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10551165066 + 10551165067.

It is an arithmetic number, because the mean of its divisors is an integer number (10551165067).

Almost surely, 2^21102330133 is an apocalyptic number.

It is an amenable number.

21102330133 is a deficient number, since it is larger than the sum of its proper divisors (1).

21102330133 is an equidigital number, since it uses as much as digits as its factorization.

21102330133 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 324, while the sum is 19.

Adding to 21102330133 its reverse (33103320112), we get a palindrome (54205650245).

The spelling of 21102330133 in words is "twenty-one billion, one hundred two million, three hundred thirty thousand, one hundred thirty-three".