1321002042103 has 2 divisors, whose sum is σ = 1321002042104. Its totient is φ = 1321002042102.

The previous prime is 1321002042079. The next prime is 1321002042127. The reversal of 1321002042103 is 3012402001231.

It is a happy number.

It is a balanced prime because it is at equal distance from previous prime (1321002042079) and next prime (1321002042127).

It is a cyclic number.

It is not a de Polignac number, because 1321002042103 - 2³³ = 1312412107511 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1321002042203) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 660501021051 + 660501021052.

It is an arithmetic number, because the mean of its divisors is an integer number (660501021052).

Almost surely, 2^{1321002042103} is an apocalyptic number.

1321002042103 is a deficient number, since it is larger than the sum of its proper divisors (1).

1321002042103 is an equidigital number, since it uses as much as digits as its factorization.

1321002042103 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 1321002042103 its reverse (3012402001231), we get a palindrome (4333404043334).

The spelling of 1321002042103 in words is "one trillion, three hundred twenty-one billion, two million, forty-two thousand, one hundred three".