21112212067 has 2 divisors, whose sum is σ = 21112212068. Its totient is φ = 21112212066.

The previous prime is 21112211993. The next prime is 21112212137. The reversal of 21112212067 is 76021221112.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21112212067 is a prime.

It is not a weakly prime, because it can be changed into another prime (21112212167) 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, 10556106033 + 10556106034.

It is an arithmetic number, because the mean of its divisors is an integer number (10556106034).

Almost surely, 2^21112212067 is an apocalyptic number.

21112212067 is a deficient number, since it is larger than the sum of its proper divisors (1).

21112212067 is an equidigital number, since it uses as much as digits as its factorization.

21112212067 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 672, while the sum is 25.

Adding to 21112212067 its reverse (76021221112), we get a palindrome (97133433179).

The spelling of 21112212067 in words is "twenty-one billion, one hundred twelve million, two hundred twelve thousand, sixty-seven".