212211022081 has 2 divisors, whose sum is σ = 212211022082. Its totient is φ = 212211022080.

The previous prime is 212211022019. The next prime is 212211022141. The reversal of 212211022081 is 180220112212.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 211894502400 + 316519681 = 460320^2 + 17791^2 .

It is a cyclic number.

It is not a de Polignac number, because 212211022081 - 2¹⁵ = 212210989313 is a prime.

It is a super-2 number, since 2×212211022081² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (212211022181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106105511040 + 106105511041.

It is an arithmetic number, because the mean of its divisors is an integer number (106105511041).

Almost surely, 2^212211022081 is an apocalyptic number.

It is an amenable number.

212211022081 is a deficient number, since it is larger than the sum of its proper divisors (1).

212211022081 is an equidigital number, since it uses as much as digits as its factorization.

212211022081 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 256, while the sum is 22.

Adding to 212211022081 its reverse (180220112212), we get a palindrome (392431134293).

The spelling of 212211022081 in words is "two hundred twelve billion, two hundred eleven million, twenty-two thousand, eighty-one".