21012333104453 has 2 divisors, whose sum is σ = 21012333104454. Its totient is φ = 21012333104452.

The previous prime is 21012333104419. The next prime is 21012333104467. The reversal of 21012333104453 is 35440133321012.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14810475039844 + 6201858064609 = 3848438^2 + 2490353^2 .

It is a cyclic number.

It is not a de Polignac number, because 21012333104453 - 2⁸ = 21012333104197 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21012333103453) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10506166552226 + 10506166552227.

It is an arithmetic number, because the mean of its divisors is an integer number (10506166552227).

Almost surely, 2^{21012333104453} is an apocalyptic number.

It is an amenable number.

21012333104453 is a deficient number, since it is larger than the sum of its proper divisors (1).

21012333104453 is an equidigital number, since it uses as much as digits as its factorization.

21012333104453 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 25920, while the sum is 32.

Adding to 21012333104453 its reverse (35440133321012), we get a palindrome (56452466425465).

The spelling of 21012333104453 in words is "twenty-one trillion, twelve billion, three hundred thirty-three million, one hundred four thousand, four hundred fifty-three".