1091272011 has 24 divisors (see below), whose sum is σ = 1545065280. Its totient is φ = 683221392.

The previous prime is 1091272009. The next prime is 1091272033. The reversal of 1091272011 is 1102721901.

It is not a de Polignac number, because 1091272011 - 2¹ = 1091272009 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1091272411) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 918760 + ... + 919946.

It is an arithmetic number, because the mean of its divisors is an integer number (64377720).

Almost surely, 2^1091272011 is an apocalyptic number.

1091272011 is a deficient number, since it is larger than the sum of its proper divisors (453793269).

1091272011 is a wasteful number, since it uses less digits than its factorization.

1091272011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1463 (or 1336 counting only the distinct ones).

The product of its (nonzero) digits is 252, while the sum is 24.

The square root of 1091272011 is about 33034.4064726461. The cubic root of 1091272011 is about 1029.5426413859.

Adding to 1091272011 its reverse (1102721901), we get a palindrome (2193993912).

The spelling of 1091272011 in words is "one billion, ninety-one million, two hundred seventy-two thousand, eleven".