21223231020133 has 2 divisors, whose sum is σ = 21223231020134. Its totient is φ = 21223231020132.

The previous prime is 21223231020127. The next prime is 21223231020143. The reversal of 21223231020133 is 33102013232212.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 21072809603169 + 150421416964 = 4590513^2 + 387842^2 .

It is a cyclic number.

It is not a de Polignac number, because 21223231020133 - 2⁴¹ = 19024207764581 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21223231020098 and 21223231020107.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21223231020143) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10611615510066 + 10611615510067.

It is an arithmetic number, because the mean of its divisors is an integer number (10611615510067).

Almost surely, 2^{21223231020133} is an apocalyptic number.

It is an amenable number.

21223231020133 is a deficient number, since it is larger than the sum of its proper divisors (1).

21223231020133 is an equidigital number, since it uses as much as digits as its factorization.

21223231020133 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2592, while the sum is 25.

Adding to 21223231020133 its reverse (33102013232212), we get a palindrome (54325244252345).

The spelling of 21223231020133 in words is "twenty-one trillion, two hundred twenty-three billion, two hundred thirty-one million, twenty thousand, one hundred thirty-three".