11501122172 has 12 divisors (see below), whose sum is σ = 20260256016. Its totient is φ = 5712477600.

The previous prime is 11501122163. The next prime is 11501122177. The reversal of 11501122172 is 27122110511.

It is a happy number.

11501122172 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×11501122172² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11501122177) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9520193 + ... + 9521400.

It is an arithmetic number, because the mean of its divisors is an integer number (1688354668).

Almost surely, 2^11501122172 is an apocalyptic number.

It is an amenable number.

11501122172 is a deficient number, since it is larger than the sum of its proper divisors (8759133844).

11501122172 is a wasteful number, since it uses less digits than its factorization.

11501122172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19041748 (or 19041746 counting only the distinct ones).

The product of its (nonzero) digits is 280, while the sum is 23.

Adding to 11501122172 its reverse (27122110511), we get a palindrome (38623232683).

The spelling of 11501122172 in words is "eleven billion, five hundred one million, one hundred twenty-two thousand, one hundred seventy-two".