121103231321 has 4 divisors (see below), whose sum is σ = 121382915892. Its totient is φ = 120823546752.

The previous prime is 121103231317. The next prime is 121103231351. The reversal of 121103231321 is 123132301121.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 34007416921 + 87095814400 = 184411^2 + 295120^2 .

It is a cyclic number.

It is not a de Polignac number, because 121103231321 - 2² = 121103231317 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 121103231293 and 121103231302.

It is not an unprimeable number, because it can be changed into a prime (121103231351) 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, 139841636 + ... + 139842501.

It is an arithmetic number, because the mean of its divisors is an integer number (30345728973).

Almost surely, 2^121103231321 is an apocalyptic number.

It is an amenable number.

121103231321 is a deficient number, since it is larger than the sum of its proper divisors (279684571).

121103231321 is an equidigital number, since it uses as much as digits as its factorization.

121103231321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 279684570.

The product of its (nonzero) digits is 216, while the sum is 20.

Adding to 121103231321 its reverse (123132301121), we get a palindrome (244235532442).

The spelling of 121103231321 in words is "one hundred twenty-one billion, one hundred three million, two hundred thirty-one thousand, three hundred twenty-one".