21021033113323 has 2 divisors, whose sum is σ = 21021033113324. Its totient is φ = 21021033113322.

The previous prime is 21021033113261. The next prime is 21021033113363. The reversal of 21021033113323 is 32331133012012.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21021033113323 - 2¹⁷ = 21021032982251 is a prime.

It is not a weakly prime, because it can be changed into another prime (21021033113363) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10510516556661 + 10510516556662.

It is an arithmetic number, because the mean of its divisors is an integer number (10510516556662).

Almost surely, 2^{21021033113323} is an apocalyptic number.

21021033113323 is a deficient number, since it is larger than the sum of its proper divisors (1).

21021033113323 is an equidigital number, since it uses as much as digits as its factorization.

21021033113323 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1944, while the sum is 25.

Adding to 21021033113323 its reverse (32331133012012), we get a palindrome (53352166125335).

The spelling of 21021033113323 in words is "twenty-one trillion, twenty-one billion, thirty-three million, one hundred thirteen thousand, three hundred twenty-three".