201022100212121 has 2 divisors, whose sum is σ = 201022100212122. Its totient is φ = 201022100212120.

The previous prime is 201022100212093. The next prime is 201022100212147. The reversal of 201022100212121 is 121212001220102.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 111042362576896 + 89979737635225 = 10537664^2 + 9485765^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-201022100212121 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 201022100212121.

It is not a weakly prime, because it can be changed into another prime (201022100214121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100511050106060 + 100511050106061.

It is an arithmetic number, because the mean of its divisors is an integer number (100511050106061).

Almost surely, 2^{201022100212121} is an apocalyptic number.

It is an amenable number.

201022100212121 is a deficient number, since it is larger than the sum of its proper divisors (1).

201022100212121 is an equidigital number, since it uses as much as digits as its factorization.

201022100212121 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 201022100212121 its reverse (121212001220102), we get a palindrome (322234101432223).

The spelling of 201022100212121 in words is "two hundred one trillion, twenty-two billion, one hundred million, two hundred twelve thousand, one hundred twenty-one".