1091091920011 has 16 divisors (see below), whose sum is σ = 1106749163520. Its totient is φ = 1075537368000.

The previous prime is 1091091919991. The next prime is 1091091920021. The reversal of 1091091920011 is 1100291901901.

1091091920011 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 1091091920011 - 2⁵ = 1091091919979 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1091091920021) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 45463431 + ... + 45487423.

It is an arithmetic number, because the mean of its divisors is an integer number (69171822720).

Almost surely, 2^{1091091920011} is an apocalyptic number.

1091091920011 is a deficient number, since it is larger than the sum of its proper divisors (15657243509).

1091091920011 is a wasteful number, since it uses less digits than its factorization.

1091091920011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26106.

The product of its (nonzero) digits is 1458, while the sum is 34.

It can be divided in two parts, 1091091 and 920011, that added together give a palindrome (2011102).

The spelling of 1091091920011 in words is "one trillion, ninety-one billion, ninety-one million, nine hundred twenty thousand, eleven".