1203120221321 has 2 divisors, whose sum is σ = 1203120221322. Its totient is φ = 1203120221320.

The previous prime is 1203120221279. The next prime is 1203120221327. The reversal of 1203120221321 is 1231220213021.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1193908060921 + 9212160400 = 1092661^2 + 95980^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1203120221321 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1203120221293 and 1203120221302.

It is not a weakly prime, because it can be changed into another prime (1203120221327) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 601560110660 + 601560110661.

It is an arithmetic number, because the mean of its divisors is an integer number (601560110661).

Almost surely, 2^{1203120221321} is an apocalyptic number.

It is an amenable number.

1203120221321 is a deficient number, since it is larger than the sum of its proper divisors (1).

1203120221321 is an equidigital number, since it uses as much as digits as its factorization.

1203120221321 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 1203120221321 its reverse (1231220213021), we get a palindrome (2434340434342).

The spelling of 1203120221321 in words is "one trillion, two hundred three billion, one hundred twenty million, two hundred twenty-one thousand, three hundred twenty-one".