212022219121 has 2 divisors, whose sum is σ = 212022219122. Its totient is φ = 212022219120.

The previous prime is 212022219107. The next prime is 212022219181. The reversal of 212022219121 is 121912220212.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 210989560896 + 1032658225 = 459336^2 + 32135^2 .

It is a cyclic number.

It is not a de Polignac number, because 212022219121 - 2¹⁵ = 212022186353 is a prime.

It is not a weakly prime, because it can be changed into another prime (212022219181) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106011109560 + 106011109561.

It is an arithmetic number, because the mean of its divisors is an integer number (106011109561).

Almost surely, 2^212022219121 is an apocalyptic number.

It is an amenable number.

212022219121 is a deficient number, since it is larger than the sum of its proper divisors (1).

212022219121 is an equidigital number, since it uses as much as digits as its factorization.

212022219121 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 576, while the sum is 25.

Adding to 212022219121 its reverse (121912220212), we get a palindrome (333934439333).

The spelling of 212022219121 in words is "two hundred twelve billion, twenty-two million, two hundred nineteen thousand, one hundred twenty-one".