1301131231 has 2 divisors, whose sum is σ = 1301131232. Its totient is φ = 1301131230.

The previous prime is 1301131199. The next prime is 1301131243. The reversal of 1301131231 is 1321311031.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1301131231 - 2⁵ = 1301131199 is a prime.

It is a super-2 number, since 2×1301131231² = 3385884960567150722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1301131331) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 650565615 + 650565616.

It is an arithmetic number, because the mean of its divisors is an integer number (650565616).

Almost surely, 2^1301131231 is an apocalyptic number.

1301131231 is a deficient number, since it is larger than the sum of its proper divisors (1).

1301131231 is an equidigital number, since it uses as much as digits as its factorization.

1301131231 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 1301131231 is about 36071.1966948700. The cubic root of 1301131231 is about 1091.7093598620.

Adding to 1301131231 its reverse (1321311031), we get a palindrome (2622442262).

The spelling of 1301131231 in words is "one billion, three hundred one million, one hundred thirty-one thousand, two hundred thirty-one".