1111222120171 has 2 divisors, whose sum is σ = 1111222120172. Its totient is φ = 1111222120170.

The previous prime is 1111222120123. The next prime is 1111222120189. The reversal of 1111222120171 is 1710212221111.

It is a strong prime.

It is an emirp because it is prime and its reverse (1710212221111) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1111222120171 is a prime.

It is not a weakly prime, because it can be changed into another prime (1111222121171) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 555611060085 + 555611060086.

It is an arithmetic number, because the mean of its divisors is an integer number (555611060086).

Almost surely, 2^{1111222120171} is an apocalyptic number.

1111222120171 is a deficient number, since it is larger than the sum of its proper divisors (1).

1111222120171 is an equidigital number, since it uses as much as digits as its factorization.

1111222120171 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 22.

Adding to 1111222120171 its reverse (1710212221111), we get a palindrome (2821434341282).

The spelling of 1111222120171 in words is "one trillion, one hundred eleven billion, two hundred twenty-two million, one hundred twenty thousand, one hundred seventy-one".