21101043233393 has 2 divisors, whose sum is σ = 21101043233394. Its totient is φ = 21101043233392.

The previous prime is 21101043233381. The next prime is 21101043233489. The reversal of 21101043233393 is 39333234010112.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11178744832369 + 9922298401024 = 3343463^2 + 3149968^2 .

It is a cyclic number.

It is not a de Polignac number, because 21101043233393 - 2¹⁸ = 21101042971249 is a prime.

It is not a weakly prime, because it can be changed into another prime (21101043233593) 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, 10550521616696 + 10550521616697.

It is an arithmetic number, because the mean of its divisors is an integer number (10550521616697).

Almost surely, 2^{21101043233393} is an apocalyptic number.

It is an amenable number.

21101043233393 is a deficient number, since it is larger than the sum of its proper divisors (1).

21101043233393 is an equidigital number, since it uses as much as digits as its factorization.

21101043233393 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 34992, while the sum is 35.

The spelling of 21101043233393 in words is "twenty-one trillion, one hundred one billion, forty-three million, two hundred thirty-three thousand, three hundred ninety-three".