21111034267 has 2 divisors, whose sum is σ = 21111034268. Its totient is φ = 21111034266.

The previous prime is 21111034247. The next prime is 21111034283. The reversal of 21111034267 is 76243011112.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21111034267 - 2¹¹ = 21111032219 is a prime.

It is not a weakly prime, because it can be changed into another prime (21111034207) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10555517133 + 10555517134.

It is an arithmetic number, because the mean of its divisors is an integer number (10555517134).

Almost surely, 2^21111034267 is an apocalyptic number.

21111034267 is a deficient number, since it is larger than the sum of its proper divisors (1).

21111034267 is an equidigital number, since it uses as much as digits as its factorization.

21111034267 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2016, while the sum is 28.

Adding to 21111034267 its reverse (76243011112), we get a palindrome (97354045379).

The spelling of 21111034267 in words is "twenty-one billion, one hundred eleven million, thirty-four thousand, two hundred sixty-seven".