210111002202121 has 2 divisors, whose sum is σ = 210111002202122. Its totient is φ = 210111002202120.

The previous prime is 210111002202119. The next prime is 210111002202149. The reversal of 210111002202121 is 121202200111012.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 116658663146496 + 93452339055625 = 10800864^2 + 9667075^2 .

It is a cyclic number.

It is not a de Polignac number, because 210111002202121 - 2¹ = 210111002202119 is a prime.

It is a super-2 number, since 2×210111002202121² (a number of 29 digits) contains 22 as substring.

Together with 210111002202119, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 210111002202095 and 210111002202104.

It is not a weakly prime, because it can be changed into another prime (210111002202221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105055501101060 + 105055501101061.

It is an arithmetic number, because the mean of its divisors is an integer number (105055501101061).

Almost surely, 2^{210111002202121} is an apocalyptic number.

It is an amenable number.

210111002202121 is a deficient number, since it is larger than the sum of its proper divisors (1).

210111002202121 is an equidigital number, since it uses as much as digits as its factorization.

210111002202121 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 210111002202121 its reverse (121202200111012), we get a palindrome (331313202313133).

The spelling of 210111002202121 in words is "two hundred ten trillion, one hundred eleven billion, two million, two hundred two thousand, one hundred twenty-one".