1111101228 has 36 divisors (see below), whose sum is σ = 2956440760. Its totient is φ = 350873856.

The previous prime is 1111101221. The next prime is 1111101263. The reversal of 1111101228 is 8221011111.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a self number, because there is not a number n which added to its sum of digits gives 1111101228.

It is not an unprimeable number, because it can be changed into a prime (1111101221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 811525 + ... + 812892.

Almost surely, 2^1111101228 is an apocalyptic number.

1111101228 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

1111101228 is an abundant number, since it is smaller than the sum of its proper divisors (1845339532).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1111101228 is a wasteful number, since it uses less digits than its factorization.

1111101228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1624446 (or 1624441 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 18.

The square root of 1111101228 is about 33333.1850863370. The cubic root of 1111101228 is about 1035.7410977298.

Adding to 1111101228 its reverse (8221011111), we get a palindrome (9332112339).

The spelling of 1111101228 in words is "one billion, one hundred eleven million, one hundred one thousand, two hundred twenty-eight".