10116221 has 2 divisors, whose sum is σ = 10116222. Its totient is φ = 10116220.

The previous prime is 10116203. The next prime is 10116229. The reversal of 10116221 is 12261101.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8702500 + 1413721 = 2950^2 + 1189^2 .

It is an emirp because it is prime and its reverse (12261101) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 10116221 - 2¹⁸ = 9854077 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 10116196 and 10116205.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10116229) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5058110 + 5058111.

It is an arithmetic number, because the mean of its divisors is an integer number (5058111).

Almost surely, 2^10116221 is an apocalyptic number.

It is an amenable number.

10116221 is a deficient number, since it is larger than the sum of its proper divisors (1).

10116221 is an equidigital number, since it uses as much as digits as its factorization.

10116221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 24, while the sum is 14.

The square root of 10116221 is about 3180.6007294220. The cubic root of 10116221 is about 216.2748914958.

Adding to 10116221 its reverse (12261101), we get a palindrome (22377322).

The spelling of 10116221 in words is "ten million, one hundred sixteen thousand, two hundred twenty-one".