1301231311 has 2 divisors, whose sum is σ = 1301231312. Its totient is φ = 1301231310.

The previous prime is 1301231287. The next prime is 1301231329. The reversal of 1301231311 is 1131321031.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1301231311 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1301231381) 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, 650615655 + 650615656.

It is an arithmetic number, because the mean of its divisors is an integer number (650615656).

Almost surely, 2^1301231311 is an apocalyptic number.

1301231311 is a deficient number, since it is larger than the sum of its proper divisors (1).

1301231311 is an equidigital number, since it uses as much as digits as its factorization.

1301231311 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 54, while the sum is 16.

The square root of 1301231311 is about 36072.5839246373. The cubic root of 1301231311 is about 1091.7373497293.

Adding to 1301231311 its reverse (1131321031), we get a palindrome (2432552342).

The spelling of 1301231311 in words is "one billion, three hundred one million, two hundred thirty-one thousand, three hundred eleven".