1085366221 has 2 divisors, whose sum is σ = 1085366222. Its totient is φ = 1085366220.

The previous prime is 1085366179. The next prime is 1085366237. The reversal of 1085366221 is 1226635801.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 985646025 + 99720196 = 31395^2 + 9986^2 .

It is a cyclic number.

It is not a de Polignac number, because 1085366221 - 2¹⁷ = 1085235149 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1085366281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 542683110 + 542683111.

It is an arithmetic number, because the mean of its divisors is an integer number (542683111).

Almost surely, 2^1085366221 is an apocalyptic number.

It is an amenable number.

1085366221 is a deficient number, since it is larger than the sum of its proper divisors (1).

1085366221 is an equidigital number, since it uses as much as digits as its factorization.

1085366221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 17280, while the sum is 34.

The square root of 1085366221 is about 32944.8967368241. The cubic root of 1085366221 is about 1027.6820407468.

The spelling of 1085366221 in words is "one billion, eighty-five million, three hundred sixty-six thousand, two hundred twenty-one".