10091009221 has 2 divisors, whose sum is σ = 10091009222. Its totient is φ = 10091009220.

The previous prime is 10091009207. The next prime is 10091009233. The reversal of 10091009221 is 12290019001.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9585389025 + 505620196 = 97905^2 + 22486^2 .

It is a cyclic number.

It is not a de Polignac number, because 10091009221 - 2⁹ = 10091008709 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10091009281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5045504610 + 5045504611.

It is an arithmetic number, because the mean of its divisors is an integer number (5045504611).

Almost surely, 2^10091009221 is an apocalyptic number.

It is an amenable number.

10091009221 is a deficient number, since it is larger than the sum of its proper divisors (1).

10091009221 is an equidigital number, since it uses as much as digits as its factorization.

10091009221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 324, while the sum is 25.

The spelling of 10091009221 in words is "ten billion, ninety-one million, nine thousand, two hundred twenty-one".