11109898427 has 4 divisors (see below), whose sum is σ = 11111146920. Its totient is φ = 11108649936.

The previous prime is 11109898421. The next prime is 11109898447. The reversal of 11109898427 is 72489890111.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 11109898427 - 2⁴ = 11109898411 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11109898421) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 610802 + ... + 628727.

It is an arithmetic number, because the mean of its divisors is an integer number (2777786730).

Almost surely, 2^11109898427 is an apocalyptic number.

11109898427 is a deficient number, since it is larger than the sum of its proper divisors (1248493).

11109898427 is an equidigital number, since it uses as much as digits as its factorization.

11109898427 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1248492.

The product of its (nonzero) digits is 290304, while the sum is 50.

The spelling of 11109898427 in words is "eleven billion, one hundred nine million, eight hundred ninety-eight thousand, four hundred twenty-seven".