111021211202171 has 2 divisors, whose sum is σ = 111021211202172. Its totient is φ = 111021211202170.

The previous prime is 111021211202149. The next prime is 111021211202173. The reversal of 111021211202171 is 171202112120111.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-111021211202171 is a prime.

It is a super-2 number, since 2×111021211202171² (a number of 29 digits) contains 22 as substring.

Together with 111021211202173, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (111021211202173) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55510605601085 + 55510605601086.

It is an arithmetic number, because the mean of its divisors is an integer number (55510605601086).

Almost surely, 2^{111021211202171} is an apocalyptic number.

111021211202171 is a deficient number, since it is larger than the sum of its proper divisors (1).

111021211202171 is an equidigital number, since it uses as much as digits as its factorization.

111021211202171 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 112, while the sum is 23.

Adding to 111021211202171 its reverse (171202112120111), we get a palindrome (282223323322282).

The spelling of 111021211202171 in words is "one hundred eleven trillion, twenty-one billion, two hundred eleven million, two hundred two thousand, one hundred seventy-one".