212210200121 has 2 divisors, whose sum is σ = 212210200122. Its totient is φ = 212210200120.

The previous prime is 212210200063. The next prime is 212210200123. The reversal of 212210200121 is 121002012212.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 207712620025 + 4497580096 = 455755^2 + 67064^2 .

It is a cyclic number.

It is not a de Polignac number, because 212210200121 - 2¹⁴ = 212210183737 is a prime.

Together with 212210200123, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 212210200096 and 212210200105.

It is not a weakly prime, because it can be changed into another prime (212210200123) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106105100060 + 106105100061.

It is an arithmetic number, because the mean of its divisors is an integer number (106105100061).

Almost surely, 2^212210200121 is an apocalyptic number.

It is an amenable number.

212210200121 is a deficient number, since it is larger than the sum of its proper divisors (1).

212210200121 is an equidigital number, since it uses as much as digits as its factorization.

212210200121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 212210200121 its reverse (121002012212), we get a palindrome (333212212333).

The spelling of 212210200121 in words is "two hundred twelve billion, two hundred ten million, two hundred thousand, one hundred twenty-one".