21100220233271 has 2 divisors, whose sum is σ = 21100220233272. Its totient is φ = 21100220233270.

The previous prime is 21100220233207. The next prime is 21100220233349. The reversal of 21100220233271 is 17233202200112.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21100220233271 - 2⁶ = 21100220233207 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21100220233271.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21100220233471) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10550110116635 + 10550110116636.

It is an arithmetic number, because the mean of its divisors is an integer number (10550110116636).

Almost surely, 2^{21100220233271} is an apocalyptic number.

21100220233271 is a deficient number, since it is larger than the sum of its proper divisors (1).

21100220233271 is an equidigital number, since it uses as much as digits as its factorization.

21100220233271 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2016, while the sum is 26.

Adding to 21100220233271 its reverse (17233202200112), we get a palindrome (38333422433383).

The spelling of 21100220233271 in words is "twenty-one trillion, one hundred billion, two hundred twenty million, two hundred thirty-three thousand, two hundred seventy-one".