1312026555403 has 2 divisors, whose sum is σ = 1312026555404. Its totient is φ = 1312026555402.

The previous prime is 1312026555379. The next prime is 1312026555419. The reversal of 1312026555403 is 3045556202131.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1312026555403 - 2¹³ = 1312026547211 is a prime.

It is a super-2 number, since 2×1312026555403² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1312026555443) 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, 656013277701 + 656013277702.

It is an arithmetic number, because the mean of its divisors is an integer number (656013277702).

Almost surely, 2^{1312026555403} is an apocalyptic number.

1312026555403 is a deficient number, since it is larger than the sum of its proper divisors (1).

1312026555403 is an equidigital number, since it uses as much as digits as its factorization.

1312026555403 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 108000, while the sum is 37.

The spelling of 1312026555403 in words is "one trillion, three hundred twelve billion, twenty-six million, five hundred fifty-five thousand, four hundred three".