1312231332281 has 2 divisors, whose sum is σ = 1312231332282. Its totient is φ = 1312231332280.

The previous prime is 1312231332263. The next prime is 1312231332319. The reversal of 1312231332281 is 1822331322131.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 896257930681 + 415973401600 = 946709^2 + 644960^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1312231332281 is a prime.

It is a super-2 number, since 2×1312231332281² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1312231382281) 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, 656115666140 + 656115666141.

It is an arithmetic number, because the mean of its divisors is an integer number (656115666141).

Almost surely, 2^{1312231332281} is an apocalyptic number.

It is an amenable number.

1312231332281 is a deficient number, since it is larger than the sum of its proper divisors (1).

1312231332281 is an equidigital number, since it uses as much as digits as its factorization.

1312231332281 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10368, while the sum is 32.

The spelling of 1312231332281 in words is "one trillion, three hundred twelve billion, two hundred thirty-one million, three hundred thirty-two thousand, two hundred eighty-one".