1201031311 has 2 divisors, whose sum is σ = 1201031312. Its totient is φ = 1201031310.

The previous prime is 1201031303. The next prime is 1201031339. The reversal of 1201031311 is 1131301021.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1201031311 - 2³ = 1201031303 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1201031291 and 1201031300.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1201031371) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 600515655 + 600515656.

It is an arithmetic number, because the mean of its divisors is an integer number (600515656).

Almost surely, 2^1201031311 is an apocalyptic number.

1201031311 is a deficient number, since it is larger than the sum of its proper divisors (1).

1201031311 is an equidigital number, since it uses as much as digits as its factorization.

1201031311 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18, while the sum is 13.

The square root of 1201031311 is about 34655.8986465508. The cubic root of 1201031311 is about 1062.9629074227.

Adding to 1201031311 its reverse (1131301021), we get a palindrome (2332332332).

The spelling of 1201031311 in words is "one billion, two hundred one million, thirty-one thousand, three hundred eleven".