1103430311381 has 2 divisors, whose sum is σ = 1103430311382. Its totient is φ = 1103430311380.

The previous prime is 1103430311327. The next prime is 1103430311479. The reversal of 1103430311381 is 1831130343011.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 810090002500 + 293340308881 = 900050^2 + 541609^2 .

It is an emirp because it is prime and its reverse (1831130343011) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1103430311381 - 2¹⁸ = 1103430049237 is a prime.

It is a super-2 number, since 2×1103430311381² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1103430311981) 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, 551715155690 + 551715155691.

It is an arithmetic number, because the mean of its divisors is an integer number (551715155691).

Almost surely, 2^{1103430311381} is an apocalyptic number.

It is an amenable number.

1103430311381 is a deficient number, since it is larger than the sum of its proper divisors (1).

1103430311381 is an equidigital number, since it uses as much as digits as its factorization.

1103430311381 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2592, while the sum is 29.

Adding to 1103430311381 its reverse (1831130343011), we get a palindrome (2934560654392).

The spelling of 1103430311381 in words is "one trillion, one hundred three billion, four hundred thirty million, three hundred eleven thousand, three hundred eighty-one".