11011122231 has 16 divisors (see below), whose sum is σ = 15470601600. Its totient is φ = 6947015328.

The previous prime is 11011122223. The next prime is 11011122253. The reversal of 11011122231 is 13222111011.

It is not a de Polignac number, because 11011122231 - 2³ = 11011122223 is a prime.

It is a super-2 number, since 2×11011122231² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 11011122231.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11011122931) 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 15 ways as a sum of consecutive naturals, for example, 48016 + ... + 155973.

It is an arithmetic number, because the mean of its divisors is an integer number (966912600).

Almost surely, 2^11011122231 is an apocalyptic number.

11011122231 is a deficient number, since it is larger than the sum of its proper divisors (4459479369).

11011122231 is a wasteful number, since it uses less digits than its factorization.

11011122231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 204958.

The product of its (nonzero) digits is 24, while the sum is 15.

Adding to 11011122231 its reverse (13222111011), we get a palindrome (24233233242).

The spelling of 11011122231 in words is "eleven billion, eleven million, one hundred twenty-two thousand, two hundred thirty-one".