1091090212 has 6 divisors (see below), whose sum is σ = 1909407878. Its totient is φ = 545545104.

The previous prime is 1091090207. The next prime is 1091090233. The reversal of 1091090212 is 2120901901.

It can be written as a sum of positive squares in only one way, i.e., 1037741796 + 53348416 = 32214^2 + 7304^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 136386273 + ... + 136386280.

Almost surely, 2^1091090212 is an apocalyptic number.

It is an amenable number.

1091090212 is a deficient number, since it is larger than the sum of its proper divisors (818317666).

1091090212 is a wasteful number, since it uses less digits than its factorization.

1091090212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 272772557 (or 272772555 counting only the distinct ones).

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

The square root of 1091090212 is about 33031.6546966694. The cubic root of 1091090212 is about 1029.4854664514.

The spelling of 1091090212 in words is "one billion, ninety-one million, ninety thousand, two hundred twelve".