21112453211 has 2 divisors, whose sum is σ = 21112453212. Its totient is φ = 21112453210.

The previous prime is 21112453177. The next prime is 21112453223. The reversal of 21112453211 is 11235421112.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21112453211 - 2³⁰ = 20038711387 is a prime.

It is not a weakly prime, because it can be changed into another prime (21112452211) 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, 10556226605 + 10556226606.

It is an arithmetic number, because the mean of its divisors is an integer number (10556226606).

Almost surely, 2^21112453211 is an apocalyptic number.

21112453211 is a deficient number, since it is larger than the sum of its proper divisors (1).

21112453211 is an equidigital number, since it uses as much as digits as its factorization.

21112453211 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 480, while the sum is 23.

Adding to 21112453211 its reverse (11235421112), we get a palindrome (32347874323).

The spelling of 21112453211 in words is "twenty-one billion, one hundred twelve million, four hundred fifty-three thousand, two hundred eleven".