3111220312171 has 2 divisors, whose sum is σ = 3111220312172. Its totient is φ = 3111220312170.

The previous prime is 3111220312159. The next prime is 3111220312217. The reversal of 3111220312171 is 1712130221113.

3111220312171 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3111220312171 is a prime.

It is not a weakly prime, because it can be changed into another prime (3111220313171) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1555610156085 + 1555610156086.

It is an arithmetic number, because the mean of its divisors is an integer number (1555610156086).

Almost surely, 2^{3111220312171} is an apocalyptic number.

3111220312171 is a deficient number, since it is larger than the sum of its proper divisors (1).

3111220312171 is an equidigital number, since it uses as much as digits as its factorization.

3111220312171 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 504, while the sum is 25.

Adding to 3111220312171 its reverse (1712130221113), we get a palindrome (4823350533284).

The spelling of 3111220312171 in words is "three trillion, one hundred eleven billion, two hundred twenty million, three hundred twelve thousand, one hundred seventy-one".