21010110067 has 2 divisors, whose sum is σ = 21010110068. Its totient is φ = 21010110066.

The previous prime is 21010110041. The next prime is 21010110101. The reversal of 21010110067 is 76001101012.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21010110067 is a prime.

It is not a weakly prime, because it can be changed into another prime (21010150067) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10505055033 + 10505055034.

It is an arithmetic number, because the mean of its divisors is an integer number (10505055034).

Almost surely, 2^21010110067 is an apocalyptic number.

21010110067 is a deficient number, since it is larger than the sum of its proper divisors (1).

21010110067 is an equidigital number, since it uses as much as digits as its factorization.

21010110067 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 84, while the sum is 19.

Adding to 21010110067 its reverse (76001101012), we get a palindrome (97011211079).

The spelling of 21010110067 in words is "twenty-one billion, ten million, one hundred ten thousand, sixty-seven".