1215106457171 has 2 divisors, whose sum is σ = 1215106457172. Its totient is φ = 1215106457170.

The previous prime is 1215106457161. The next prime is 1215106457177. The reversal of 1215106457171 is 1717546015121.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1215106457171 - 2³⁰ = 1214032715347 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (1215106457177) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 607553228585 + 607553228586.

It is an arithmetic number, because the mean of its divisors is an integer number (607553228586).

Almost surely, 2^{1215106457171} is an apocalyptic number.

1215106457171 is a deficient number, since it is larger than the sum of its proper divisors (1).

1215106457171 is an equidigital number, since it uses as much as digits as its factorization.

1215106457171 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 58800, while the sum is 41.

The spelling of 1215106457171 in words is "one trillion, two hundred fifteen billion, one hundred six million, four hundred fifty-seven thousand, one hundred seventy-one".