11611217228 has 48 divisors (see below), whose sum is σ = 22305780000. Its totient is φ = 5255835648.

The previous prime is 11611217227. The next prime is 11611217231. The reversal of 11611217228 is 82271211611.

It is a junction number, because it is equal to n+sod(n) for n = 11611217194 and 11611217203.

It is not an unprimeable number, because it can be changed into a prime (11611217227) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1373318 + ... + 1381746.

It is an arithmetic number, because the mean of its divisors is an integer number (464703750).

Almost surely, 2^11611217228 is an apocalyptic number.

It is an amenable number.

11611217228 is a deficient number, since it is larger than the sum of its proper divisors (10694562772).

11611217228 is a wasteful number, since it uses less digits than its factorization.

11611217228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8954 (or 8952 counting only the distinct ones).

The product of its digits is 2688, while the sum is 32.

Adding to 11611217228 its reverse (82271211611), we get a palindrome (93882428839).

The spelling of 11611217228 in words is "eleven billion, six hundred eleven million, two hundred seventeen thousand, two hundred twenty-eight".