1211210102171 has 2 divisors, whose sum is σ = 1211210102172. Its totient is φ = 1211210102170.

The previous prime is 1211210102107. The next prime is 1211210102209. The reversal of 1211210102171 is 1712010121121.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1211210102171 - 2⁶ = 1211210102107 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (1211210152171) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 605605051085 + 605605051086.

It is an arithmetic number, because the mean of its divisors is an integer number (605605051086).

Almost surely, 2^{1211210102171} is an apocalyptic number.

1211210102171 is a deficient number, since it is larger than the sum of its proper divisors (1).

1211210102171 is an equidigital number, since it uses as much as digits as its factorization.

1211210102171 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 56, while the sum is 20.

Adding to 1211210102171 its reverse (1712010121121), we get a palindrome (2923220223292).

The spelling of 1211210102171 in words is "one trillion, two hundred eleven billion, two hundred ten million, one hundred two thousand, one hundred seventy-one".