11010211222121 has 2 divisors, whose sum is σ = 11010211222122. Its totient is φ = 11010211222120.

The previous prime is 11010211222117. The next prime is 11010211222123. The reversal of 11010211222121 is 12122211201011.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10237209790096 + 773001432025 = 3199564^2 + 879205^2 .

It is a cyclic number.

It is not a de Polignac number, because 11010211222121 - 2² = 11010211222117 is a prime.

Together with 11010211222123, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 11010211222121.

It is not a weakly prime, because it can be changed into another prime (11010211222123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5505105611060 + 5505105611061.

It is an arithmetic number, because the mean of its divisors is an integer number (5505105611061).

Almost surely, 2^{11010211222121} is an apocalyptic number.

It is an amenable number.

11010211222121 is a deficient number, since it is larger than the sum of its proper divisors (1).

11010211222121 is an equidigital number, since it uses as much as digits as its factorization.

11010211222121 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 17.

Adding to 11010211222121 its reverse (12122211201011), we get a palindrome (23132422423132).

The spelling of 11010211222121 in words is "eleven trillion, ten billion, two hundred eleven million, two hundred twenty-two thousand, one hundred twenty-one".