1323031203121 has 4 divisors (see below), whose sum is σ = 1323954464292. Its totient is φ = 1322107941952.

The previous prime is 1323031203037. The next prime is 1323031203139. The reversal of 1323031203121 is 1213021303231.

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 969673478400 + 353357724721 = 984720^2 + 594439^2 .

It is a cyclic number.

It is not a de Polignac number, because 1323031203121 - 2¹³ = 1323031194929 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1323031203092 and 1323031203101.

It is not an unprimeable number, because it can be changed into a prime (1323031203421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 461628436 + ... + 461631301.

It is an arithmetic number, because the mean of its divisors is an integer number (330988616073).

Almost surely, 2^{1323031203121} is an apocalyptic number.

It is an amenable number.

1323031203121 is a deficient number, since it is larger than the sum of its proper divisors (923261171).

1323031203121 is an equidigital number, since it uses as much as digits as its factorization.

1323031203121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 923261170.

The product of its (nonzero) digits is 648, while the sum is 22.

Adding to 1323031203121 its reverse (1213021303231), we get a palindrome (2536052506352).

The spelling of 1323031203121 in words is "one trillion, three hundred twenty-three billion, thirty-one million, two hundred three thousand, one hundred twenty-one".