1123204231321 has 4 divisors (see below), whose sum is σ = 1123212598144. Its totient is φ = 1123195864500.

The previous prime is 1123204231319. The next prime is 1123204231333. The reversal of 1123204231321 is 1231324023211.

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 1123204231321 - 2¹ = 1123204231319 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1123204231301) 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, 3978705 + ... + 4251646.

It is an arithmetic number, because the mean of its divisors is an integer number (280803149536).

Almost surely, 2^{1123204231321} is an apocalyptic number.

It is an amenable number.

1123204231321 is a deficient number, since it is larger than the sum of its proper divisors (8366823).

1123204231321 is an equidigital number, since it uses as much as digits as its factorization.

1123204231321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8366822.

The product of its (nonzero) digits is 1728, while the sum is 25.

Adding to 1123204231321 its reverse (1231324023211), we get a palindrome (2354528254532).

The spelling of 1123204231321 in words is "one trillion, one hundred twenty-three billion, two hundred four million, two hundred thirty-one thousand, three hundred twenty-one".