10111020012221 has 2 divisors, whose sum is σ = 10111020012222. Its totient is φ = 10111020012220.

The previous prime is 10111020012179. The next prime is 10111020012229. The reversal of 10111020012221 is 12221002011101.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6736028488996 + 3374991523225 = 2595386^2 + 1837115^2 .

It is a cyclic number.

It is not a de Polignac number, because 10111020012221 - 2¹⁴ = 10111019995837 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 10111020012196 and 10111020012205.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10111020012229) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5055510006110 + 5055510006111.

It is an arithmetic number, because the mean of its divisors is an integer number (5055510006111).

Almost surely, 2^{10111020012221} is an apocalyptic number.

It is an amenable number.

10111020012221 is a deficient number, since it is larger than the sum of its proper divisors (1).

10111020012221 is an equidigital number, since it uses as much as digits as its factorization.

10111020012221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 10111020012221 its reverse (12221002011101), we get a palindrome (22332022023322).

The spelling of 10111020012221 in words is "ten trillion, one hundred eleven billion, twenty million, twelve thousand, two hundred twenty-one".