21101100110071 has 2 divisors, whose sum is σ = 21101100110072. Its totient is φ = 21101100110070.

The previous prime is 21101100110047. The next prime is 21101100110113. The reversal of 21101100110071 is 17001100110112.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21101100110071 - 2⁹ = 21101100109559 is a prime.

It is a super-3 number, since 3×21101100110071³ (a number of 41 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21101100110471) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10550550055035 + 10550550055036.

It is an arithmetic number, because the mean of its divisors is an integer number (10550550055036).

Almost surely, 2^{21101100110071} is an apocalyptic number.

21101100110071 is a deficient number, since it is larger than the sum of its proper divisors (1).

21101100110071 is an equidigital number, since it uses as much as digits as its factorization.

21101100110071 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 14, while the sum is 16.

Adding to 21101100110071 its reverse (17001100110112), we get a palindrome (38102200220183).

The spelling of 21101100110071 in words is "twenty-one trillion, one hundred one billion, one hundred million, one hundred ten thousand, seventy-one".