211212221071 has 2 divisors, whose sum is σ = 211212221072. Its totient is φ = 211212221070.

The previous prime is 211212221069. The next prime is 211212221111. The reversal of 211212221071 is 170122212112.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 211212221071 - 2¹ = 211212221069 is a prime.

It is a super-2 number, since 2×211212221071² (a number of 23 digits) contains 22 as substring.

Together with 211212221069, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (211212221371) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105606110535 + 105606110536.

It is an arithmetic number, because the mean of its divisors is an integer number (105606110536).

Almost surely, 2^211212221071 is an apocalyptic number.

211212221071 is a deficient number, since it is larger than the sum of its proper divisors (1).

211212221071 is an equidigital number, since it uses as much as digits as its factorization.

211212221071 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 224, while the sum is 22.

Adding to 211212221071 its reverse (170122212112), we get a palindrome (381334433183).

The spelling of 211212221071 in words is "two hundred eleven billion, two hundred twelve million, two hundred twenty-one thousand, seventy-one".