10211020122221 has 2 divisors, whose sum is σ = 10211020122222. Its totient is φ = 10211020122220.

The previous prime is 10211020122169. The next prime is 10211020122257. The reversal of 10211020122221 is 12222102011201.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9249590846596 + 961429275625 = 3041314^2 + 980525^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-10211020122221 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 10211020122221.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10211020142221) 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, 5105510061110 + 5105510061111.

It is an arithmetic number, because the mean of its divisors is an integer number (5105510061111).

Almost surely, 2^{10211020122221} is an apocalyptic number.

It is an amenable number.

10211020122221 is a deficient number, since it is larger than the sum of its proper divisors (1).

10211020122221 is an equidigital number, since it uses as much as digits as its factorization.

10211020122221 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 10211020122221 its reverse (12222102011201), we get a palindrome (22433122133422).

The spelling of 10211020122221 in words is "ten trillion, two hundred eleven billion, twenty million, one hundred twenty-two thousand, two hundred twenty-one".