1091099381133 has 16 divisors (see below), whose sum is σ = 1455871138560. Its totient is φ = 726863801664.

The previous prime is 1091099381093. The next prime is 1091099381153. The reversal of 1091099381133 is 3311839901901.

It is a happy number.

It is not a de Polignac number, because 1091099381133 - 2¹³ = 1091099372941 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1091099381153) 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, 25359403 + ... + 25402391.

It is an arithmetic number, because the mean of its divisors is an integer number (90991946160).

Almost surely, 2^{1091099381133} is an apocalyptic number.

It is an amenable number.

1091099381133 is a deficient number, since it is larger than the sum of its proper divisors (364771757427).

1091099381133 is a wasteful number, since it uses less digits than its factorization.

1091099381133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49028.

The product of its (nonzero) digits is 157464, while the sum is 48.

The spelling of 1091099381133 in words is "one trillion, ninety-one billion, ninety-nine million, three hundred eighty-one thousand, one hundred thirty-three".