212023320121 has 2 divisors, whose sum is σ = 212023320122. Its totient is φ = 212023320120.

The previous prime is 212023320097. The next prime is 212023320143. The reversal of 212023320121 is 121023320212.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 179385284521 + 32638035600 = 423539^2 + 180660^2 .

It is a cyclic number.

It is not a de Polignac number, because 212023320121 - 2¹⁹ = 212022795833 is a prime.

It is a super-3 number, since 3×212023320121³ (a number of 35 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (212023320151) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106011660060 + 106011660061.

It is an arithmetic number, because the mean of its divisors is an integer number (106011660061).

Almost surely, 2^212023320121 is an apocalyptic number.

It is an amenable number.

212023320121 is a deficient number, since it is larger than the sum of its proper divisors (1).

212023320121 is an equidigital number, since it uses as much as digits as its factorization.

212023320121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 212023320121 its reverse (121023320212), we get a palindrome (333046640333).

Subtracting from 212023320121 its reverse (121023320212), we obtain a palindrome (90999999909).

The spelling of 212023320121 in words is "two hundred twelve billion, twenty-three million, three hundred twenty thousand, one hundred twenty-one".