121232321 has 24 divisors (see below), whose sum is σ = 150307200. Its totient is φ = 97720896.

The previous prime is 121232311. The next prime is 121232347. The reversal of 121232321 is 123232121.

121232321 is an esthetic number in base 10, because in such base its adjacent digits differ by 1.

It is not a de Polignac number, because 121232321 - 2¹⁴ = 121215937 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is an alternating number because its digits alternate between odd and even.

It is a self number, because there is not a number n which added to its sum of digits gives 121232321.

It is not an unprimeable number, because it can be changed into a prime (121232311) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 98516 + ... + 99738.

It is an arithmetic number, because the mean of its divisors is an integer number (6262800).

Almost surely, 2^121232321 is an apocalyptic number.

It is an amenable number.

121232321 is a deficient number, since it is larger than the sum of its proper divisors (29074879).

121232321 is an equidigital number, since it uses as much as digits as its factorization.

121232321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1278 (or 1247 counting only the distinct ones).

The product of its digits is 144, while the sum is 17.

The square root of 121232321 is about 11010.5549814712. The cubic root of 121232321 is about 494.9250929061.

Adding to 121232321 its reverse (123232121), we get a palindrome (244464442).

It can be divided in two parts, 1212 and 32321, that added together give a palindrome (33533).

The spelling of 121232321 in words is "one hundred twenty-one million, two hundred thirty-two thousand, three hundred twenty-one".