1121243402321 has 4 divisors (see below), whose sum is σ = 1281421031232. Its totient is φ = 961065773412.

The previous prime is 1121243402311. The next prime is 1121243402327. The reversal of 1121243402321 is 1232043421211.

It is a happy number.

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.

It is a cyclic number.

It is not a de Polignac number, because 1121243402321 - 2¹⁰ = 1121243401297 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1121243402327) 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, 80088814445 + ... + 80088814458.

It is an arithmetic number, because the mean of its divisors is an integer number (320355257808).

Almost surely, 2^{1121243402321} is an apocalyptic number.

It is an amenable number.

1121243402321 is a deficient number, since it is larger than the sum of its proper divisors (160177628911).

1121243402321 is an equidigital number, since it uses as much as digits as its factorization.

1121243402321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 160177628910.

The product of its (nonzero) digits is 2304, while the sum is 26.

Adding to 1121243402321 its reverse (1232043421211), we get a palindrome (2353286823532).

The spelling of 1121243402321 in words is "one trillion, one hundred twenty-one billion, two hundred forty-three million, four hundred two thousand, three hundred twenty-one".