1009191111092 has 24 divisors (see below), whose sum is σ = 1767950272200. Its totient is φ = 504062631936.

The previous prime is 1009191111079. The next prime is 1009191111109. The reversal of 1009191111092 is 2901111919001.

It can be written as a sum of positive squares in 4 ways, for example, as 78402240016 + 930788871076 = 280004^2 + 964774^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28710584 + ... + 28745712.

It is an arithmetic number, because the mean of its divisors is an integer number (73664594675).

Almost surely, 2^{1009191111092} is an apocalyptic number.

It is an amenable number.

1009191111092 is a deficient number, since it is larger than the sum of its proper divisors (758759161108).

1009191111092 is a wasteful number, since it uses less digits than its factorization.

1009191111092 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42515 (or 42513 counting only the distinct ones).

The product of its (nonzero) digits is 1458, while the sum is 35.

The spelling of 1009191111092 in words is "one trillion, nine billion, one hundred ninety-one million, one hundred eleven thousand, ninety-two".