1203313211281 has 2 divisors, whose sum is σ = 1203313211282. Its totient is φ = 1203313211280.

The previous prime is 1203313211201. The next prime is 1203313211299. The reversal of 1203313211281 is 1821123133021.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1046979168400 + 156334042881 = 1023220^2 + 395391^2 .

It is an emirp because it is prime and its reverse (1821123133021) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1203313211281 - 2⁷ = 1203313211153 is a prime.

It is a super-2 number, since 2×1203313211281² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1203313211201) 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, 601656605640 + 601656605641.

It is an arithmetic number, because the mean of its divisors is an integer number (601656605641).

Almost surely, 2^{1203313211281} is an apocalyptic number.

It is an amenable number.

1203313211281 is a deficient number, since it is larger than the sum of its proper divisors (1).

1203313211281 is an equidigital number, since it uses as much as digits as its factorization.

1203313211281 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1728, while the sum is 28.

The spelling of 1203313211281 in words is "one trillion, two hundred three billion, three hundred thirteen million, two hundred eleven thousand, two hundred eighty-one".