10111332221 has 2 divisors, whose sum is σ = 10111332222. Its totient is φ = 10111332220.

The previous prime is 10111332191. The next prime is 10111332227. The reversal of 10111332221 is 12223311101.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7300848025 + 2810484196 = 85445^2 + 53014^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-10111332221 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 10111332221.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10111332227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5055666110 + 5055666111.

It is an arithmetic number, because the mean of its divisors is an integer number (5055666111).

Almost surely, 2^10111332221 is an apocalyptic number.

It is an amenable number.

10111332221 is a deficient number, since it is larger than the sum of its proper divisors (1).

10111332221 is an equidigital number, since it uses as much as digits as its factorization.

10111332221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 10111332221 its reverse (12223311101), we get a palindrome (22334643322).

The spelling of 10111332221 in words is "ten billion, one hundred eleven million, three hundred thirty-two thousand, two hundred twenty-one".