211212212089 has 2 divisors, whose sum is σ = 211212212090. Its totient is φ = 211212212088.

The previous prime is 211212212077. The next prime is 211212212131. The reversal of 211212212089 is 980212212112.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 211177011600 + 35200489 = 459540^2 + 5933^2 .

It is a cyclic number.

It is not a de Polignac number, because 211212212089 - 2⁹ = 211212211577 is a prime.

It is a super-2 number, since 2×211212212089² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 211212212089.

It is not a weakly prime, because it can be changed into another prime (211212212069) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105606106044 + 105606106045.

It is an arithmetic number, because the mean of its divisors is an integer number (105606106045).

Almost surely, 2^211212212089 is an apocalyptic number.

It is an amenable number.

211212212089 is a deficient number, since it is larger than the sum of its proper divisors (1).

211212212089 is an equidigital number, since it uses as much as digits as its factorization.

211212212089 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2304, while the sum is 31.

The spelling of 211212212089 in words is "two hundred eleven billion, two hundred twelve million, two hundred twelve thousand, eighty-nine".