1201031311331 has 2 divisors, whose sum is σ = 1201031311332. Its totient is φ = 1201031311330.

The previous prime is 1201031311303. The next prime is 1201031311369. The reversal of 1201031311331 is 1331131301021.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1201031311331 - 2²² = 1201027117027 is a prime.

It is a super-2 number, since 2×1201031311331² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1201031511331) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 600515655665 + 600515655666.

It is an arithmetic number, because the mean of its divisors is an integer number (600515655666).

Almost surely, 2^{1201031311331} is an apocalyptic number.

1201031311331 is a deficient number, since it is larger than the sum of its proper divisors (1).

1201031311331 is an equidigital number, since it uses as much as digits as its factorization.

1201031311331 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 162, while the sum is 20.

Adding to 1201031311331 its reverse (1331131301021), we get a palindrome (2532162612352).

The spelling of 1201031311331 in words is "one trillion, two hundred one billion, thirty-one million, three hundred eleven thousand, three hundred thirty-one".