212121122002171 has 2 divisors, whose sum is σ = 212121122002172. Its totient is φ = 212121122002170.

The previous prime is 212121122002151. The next prime is 212121122002219. The reversal of 212121122002171 is 171200221121212.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 212121122002171 - 2²⁵ = 212121088447739 is a prime.

It is not a weakly prime, because it can be changed into another prime (212121122002151) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106060561001085 + 106060561001086.

It is an arithmetic number, because the mean of its divisors is an integer number (106060561001086).

Almost surely, 2^{212121122002171} is an apocalyptic number.

212121122002171 is a deficient number, since it is larger than the sum of its proper divisors (1).

212121122002171 is an equidigital number, since it uses as much as digits as its factorization.

212121122002171 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 448, while the sum is 25.

Adding to 212121122002171 its reverse (171200221121212), we get a palindrome (383321343123383).

The spelling of 212121122002171 in words is "two hundred twelve trillion, one hundred twenty-one billion, one hundred twenty-two million, two thousand, one hundred seventy-one".