201201210222121 has 2 divisors, whose sum is σ = 201201210222122. Its totient is φ = 201201210222120.

The previous prime is 201201210222119. The next prime is 201201210222127. The reversal of 201201210222121 is 121222012102102.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 117084064250521 + 84117145971600 = 10820539^2 + 9171540^2 .

It is a cyclic number.

It is not a de Polignac number, because 201201210222121 - 2¹ = 201201210222119 is a prime.

It is a super-2 number, since 2×201201210222121² (a number of 29 digits) contains 22 as substring.

Together with 201201210222119, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (201201210222127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100600605111060 + 100600605111061.

It is an arithmetic number, because the mean of its divisors is an integer number (100600605111061).

Almost surely, 2^{201201210222121} is an apocalyptic number.

It is an amenable number.

201201210222121 is a deficient number, since it is larger than the sum of its proper divisors (1).

201201210222121 is an equidigital number, since it uses as much as digits as its factorization.

201201210222121 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 201201210222121 its reverse (121222012102102), we get a palindrome (322423222324223).

The spelling of 201201210222121 in words is "two hundred one trillion, two hundred one billion, two hundred ten million, two hundred twenty-two thousand, one hundred twenty-one".