11109891442 has 32 divisors (see below), whose sum is σ = 19465944624. Its totient is φ = 4708300800.

The previous prime is 11109891439. The next prime is 11109891479. The reversal of 11109891442 is 24419890111.

It can be written as a sum of positive squares in 8 ways, for example, as 2027610841 + 9082280601 = 45029^2 + 95301^2 .

It is a junction number, because it is equal to n+sod(n) for n = 11109891395 and 11109891404.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 288409 + ... + 324652.

Almost surely, 2^11109891442 is an apocalyptic number.

11109891442 is a deficient number, since it is larger than the sum of its proper divisors (8356053182).

11109891442 is a wasteful number, since it uses less digits than its factorization.

11109891442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 613134.

The product of its (nonzero) digits is 20736, while the sum is 40.

The spelling of 11109891442 in words is "eleven billion, one hundred nine million, eight hundred ninety-one thousand, four hundred forty-two".