11121233212172 has 6 divisors (see below), whose sum is σ = 19462158121308. Its totient is φ = 5560616606084.

The previous prime is 11121233212171. The next prime is 11121233212189. The reversal of 11121233212172 is 27121233212111.

11121233212172 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (11121233212171) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1390154151518 + ... + 1390154151525.

It is an arithmetic number, because the mean of its divisors is an integer number (3243693020218).

Almost surely, 2^{11121233212172} is an apocalyptic number.

It is an amenable number.

11121233212172 is a deficient number, since it is larger than the sum of its proper divisors (8340924909136).

11121233212172 is a wasteful number, since it uses less digits than its factorization.

11121233212172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2780308303047 (or 2780308303045 counting only the distinct ones).

The product of its digits is 2016, while the sum is 29.

Adding to 11121233212172 its reverse (27121233212111), we get a palindrome (38242466424283).

The spelling of 11121233212172 in words is "eleven trillion, one hundred twenty-one billion, two hundred thirty-three million, two hundred twelve thousand, one hundred seventy-two".