11198881 has 4 divisors (see below), whose sum is σ = 11307712. Its totient is φ = 11090052.

The previous prime is 11198879. The next prime is 11198893. The reversal of 11198881 is 18889111.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 18889111 = 1471 ⋅12841.

It is a cyclic number.

It is not a de Polignac number, because 11198881 - 2¹ = 11198879 is a prime.

It is a super-2 number, since 2×11198881² = 250829871304322, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 11198881.

It is not an unprimeable number, because it can be changed into a prime (11198821) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 54261 + ... + 54466.

It is an arithmetic number, because the mean of its divisors is an integer number (2826928).

Almost surely, 2^11198881 is an apocalyptic number.

It is an amenable number.

11198881 is a deficient number, since it is larger than the sum of its proper divisors (108831).

11198881 is a wasteful number, since it uses less digits than its factorization.

11198881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108830.

The product of its digits is 4608, while the sum is 37.

The square root of 11198881 is about 3346.4729193585. The cubic root of 11198881 is about 223.7303369007.

It can be divided in two parts, 1119 and 8881, that added together give a 4-th power (10000 = 10⁴).

The spelling of 11198881 in words is "eleven million, one hundred ninety-eight thousand, eight hundred eighty-one".