212021202202171 has 2 divisors, whose sum is σ = 212021202202172. Its totient is φ = 212021202202170.

The previous prime is 212021202202157. The next prime is 212021202202279. The reversal of 212021202202171 is 171202202120212.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 212021202202171 - 2¹³ = 212021202193979 is a prime.

It is a super-2 number, since 2×212021202202171² (a number of 29 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (212021202262171) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106010601101085 + 106010601101086.

It is an arithmetic number, because the mean of its divisors is an integer number (106010601101086).

Almost surely, 2^{212021202202171} is an apocalyptic number.

212021202202171 is a deficient number, since it is larger than the sum of its proper divisors (1).

212021202202171 is an equidigital number, since it uses as much as digits as its factorization.

212021202202171 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 896, while the sum is 25.

Adding to 212021202202171 its reverse (171202202120212), we get a palindrome (383223404322383).

The spelling of 212021202202171 in words is "two hundred twelve trillion, twenty-one billion, two hundred two million, two hundred two thousand, one hundred seventy-one".