1212210020171 has 2 divisors, whose sum is σ = 1212210020172. Its totient is φ = 1212210020170.

The previous prime is 1212210020159. The next prime is 1212210020207. The reversal of 1212210020171 is 1710200122121.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1212210020171 is a prime.

It is not a weakly prime, because it can be changed into another prime (1212210020471) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 606105010085 + 606105010086.

It is an arithmetic number, because the mean of its divisors is an integer number (606105010086).

Almost surely, 2^{1212210020171} is an apocalyptic number.

1212210020171 is a deficient number, since it is larger than the sum of its proper divisors (1).

1212210020171 is an equidigital number, since it uses as much as digits as its factorization.

1212210020171 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 112, while the sum is 20.

Adding to 1212210020171 its reverse (1710200122121), we get a palindrome (2922410142292).

The spelling of 1212210020171 in words is "one trillion, two hundred twelve billion, two hundred ten million, twenty thousand, one hundred seventy-one".