11101121228 has 24 divisors (see below), whose sum is σ = 19679692032. Its totient is φ = 5478704784.

The previous prime is 11101121221. The next prime is 11101121231. The reversal of 11101121228 is 82212110111.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (11101121221) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 82601 + ... + 170367.

It is an arithmetic number, because the mean of its divisors is an integer number (819987168).

Almost surely, 2^11101121228 is an apocalyptic number.

It is an amenable number.

11101121228 is a deficient number, since it is larger than the sum of its proper divisors (8578570804).

11101121228 is a wasteful number, since it uses less digits than its factorization.

11101121228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88181 (or 88179 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 20.

Adding to 11101121228 its reverse (82212110111), we get a palindrome (93313231339).

The spelling of 11101121228 in words is "eleven billion, one hundred one million, one hundred twenty-one thousand, two hundred twenty-eight".