212122121171 has 2 divisors, whose sum is σ = 212122121172. Its totient is φ = 212122121170.

The previous prime is 212122121147. The next prime is 212122121207. The reversal of 212122121171 is 171121221212.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 212122121171 - 2¹⁴ = 212122104787 is a prime.

It is a super-2 number, since 2×212122121171² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (212122121371) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106061060585 + 106061060586.

It is an arithmetic number, because the mean of its divisors is an integer number (106061060586).

Almost surely, 2^212122121171 is an apocalyptic number.

212122121171 is a deficient number, since it is larger than the sum of its proper divisors (1).

212122121171 is an equidigital number, since it uses as much as digits as its factorization.

212122121171 is an evil number, because the sum of its binary digits is even.

The product of its digits is 224, while the sum is 23.

Adding to 212122121171 its reverse (171121221212), we get a palindrome (383243342383).

The spelling of 212122121171 in words is "two hundred twelve billion, one hundred twenty-two million, one hundred twenty-one thousand, one hundred seventy-one".