12311121 has 16 divisors (see below), whose sum is σ = 16974144. Its totient is φ = 7930944.

The previous prime is 12311119. The next prime is 12311137. The reversal of 12311121 is 12111321.

It is not a de Polignac number, because 12311121 - 2¹ = 12311119 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12311097 and 12311106.

It is not an unprimeable number, because it can be changed into a prime (12311191) 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, 21586 + ... + 22148.

It is an arithmetic number, because the mean of its divisors is an integer number (1060884).

Almost surely, 2^12311121 is an apocalyptic number.

It is an amenable number.

12311121 is a deficient number, since it is larger than the sum of its proper divisors (4663023).

12311121 is a wasteful number, since it uses less digits than its factorization.

12311121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 800.

The product of its digits is 12, while the sum is 12.

The square root of 12311121 is about 3508.7207070384. The cubic root of 12311121 is about 230.9045725663.

Adding to 12311121 its reverse (12111321), we get a palindrome (24422442).

The spelling of 12311121 in words is "twelve million, three hundred eleven thousand, one hundred twenty-one".