1091222105 has 8 divisors (see below), whose sum is σ = 1310175432. Its totient is φ = 872505088.

The previous prime is 1091222089. The next prime is 1091222149. The reversal of 1091222105 is 5012221901.

It can be written as a sum of positive squares in 4 ways, for example, as 373571584 + 717650521 = 19328^2 + 26789^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1091222105 - 2⁴ = 1091222089 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 48752 + ... + 67521.

It is an arithmetic number, because the mean of its divisors is an integer number (163771929).

Almost surely, 2^1091222105 is an apocalyptic number.

It is an amenable number.

1091222105 is a deficient number, since it is larger than the sum of its proper divisors (218953327).

1091222105 is a wasteful number, since it uses less digits than its factorization.

1091222105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 118155.

The product of its (nonzero) digits is 360, while the sum is 23.

The square root of 1091222105 is about 33033.6511000525. The cubic root of 1091222105 is about 1029.5269468149.

The spelling of 1091222105 in words is "one billion, ninety-one million, two hundred twenty-two thousand, one hundred five".