10111010028221 has 2 divisors, whose sum is σ = 10111010028222. Its totient is φ = 10111010028220.

The previous prime is 10111010028199. The next prime is 10111010028239. The reversal of 10111010028221 is 12282001011101.

It is a happy number.

10111010028221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9709923405625 + 401086622596 = 3116075^2 + 633314^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-10111010028221 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 10111010028193 and 10111010028202.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10111010028271) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5055505014110 + 5055505014111.

It is an arithmetic number, because the mean of its divisors is an integer number (5055505014111).

Almost surely, 2^{10111010028221} is an apocalyptic number.

It is an amenable number.

10111010028221 is a deficient number, since it is larger than the sum of its proper divisors (1).

10111010028221 is an equidigital number, since it uses as much as digits as its factorization.

10111010028221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 64, while the sum is 20.

Adding to 10111010028221 its reverse (12282001011101), we get a palindrome (22393011039322).

The spelling of 10111010028221 in words is "ten trillion, one hundred eleven billion, ten million, twenty-eight thousand, two hundred twenty-one".