21033301311053 has 2 divisors, whose sum is σ = 21033301311054. Its totient is φ = 21033301311052.

The previous prime is 21033301310893. The next prime is 21033301311079. The reversal of 21033301311053 is 35011310333012.

It is an a-pointer prime, because the next prime (21033301311079) can be obtained adding 21033301311053 to its sum of digits (26).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20956454263684 + 76847047369 = 4577822^2 + 277213^2 .

It is a cyclic number.

It is not a de Polignac number, because 21033301311053 - 2²⁴ = 21033284533837 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21033301311853) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10516650655526 + 10516650655527.

It is an arithmetic number, because the mean of its divisors is an integer number (10516650655527).

Almost surely, 2^{21033301311053} is an apocalyptic number.

It is an amenable number.

21033301311053 is a deficient number, since it is larger than the sum of its proper divisors (1).

21033301311053 is an equidigital number, since it uses as much as digits as its factorization.

21033301311053 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2430, while the sum is 26.

Adding to 21033301311053 its reverse (35011310333012), we get a palindrome (56044611644065).

The spelling of 21033301311053 in words is "twenty-one trillion, thirty-three billion, three hundred one million, three hundred eleven thousand, fifty-three".