211022121971 has 2 divisors, whose sum is σ = 211022121972. Its totient is φ = 211022121970.

The previous prime is 211022121953. The next prime is 211022122027. The reversal of 211022121971 is 179121220112.

211022121971 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 211022121971 - 2²⁶ = 210955013107 is a prime.

It is a super-2 number, since 2×211022121971² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (211022121931) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105511060985 + 105511060986.

It is an arithmetic number, because the mean of its divisors is an integer number (105511060986).

Almost surely, 2^211022121971 is an apocalyptic number.

211022121971 is a deficient number, since it is larger than the sum of its proper divisors (1).

211022121971 is an equidigital number, since it uses as much as digits as its factorization.

211022121971 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1008, while the sum is 29.

The spelling of 211022121971 in words is "two hundred eleven billion, twenty-two million, one hundred twenty-one thousand, nine hundred seventy-one".