12232121 has 4 divisors (see below), whose sum is σ = 13344144. Its totient is φ = 11120100.

The previous prime is 12232117. The next prime is 12232141. The reversal of 12232121 is 12123221.

It is a happy number.

12232121 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 12123221 = 11 ⋅1102111.

It is a cyclic number.

It is not a de Polignac number, because 12232121 - 2² = 12232117 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 12232096 and 12232105.

It is not an unprimeable number, because it can be changed into a prime (12232141) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 555995 + ... + 556016.

It is an arithmetic number, because the mean of its divisors is an integer number (3336036).

Almost surely, 2^12232121 is an apocalyptic number.

12232121 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

12232121 is a deficient number, since it is larger than the sum of its proper divisors (1112023).

12232121 is a wasteful number, since it uses less digits than its factorization.

12232121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1112022.

The product of its digits is 48, while the sum is 14.

The square root of 12232121 is about 3497.4449245128. Note that the first 3 decimals coincide. The cubic root of 12232121 is about 230.4096103506.

Adding to 12232121 its reverse (12123221), we get a palindrome (24355342).

Subtracting from 12232121 its reverse (12123221), we obtain a square (108900 = 330²).

The spelling of 12232121 in words is "twelve million, two hundred thirty-two thousand, one hundred twenty-one".