1021203123103 has 2 divisors, whose sum is σ = 1021203123104. Its totient is φ = 1021203123102.

The previous prime is 1021203123049. The next prime is 1021203123107. The reversal of 1021203123103 is 3013213021201.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1021203123103 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1021203123107) 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, 510601561551 + 510601561552.

It is an arithmetic number, because the mean of its divisors is an integer number (510601561552).

Almost surely, 2^{1021203123103} is an apocalyptic number.

1021203123103 is a deficient number, since it is larger than the sum of its proper divisors (1).

1021203123103 is an equidigital number, since it uses as much as digits as its factorization.

1021203123103 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 1021203123103 its reverse (3013213021201), we get a palindrome (4034416144304).

It can be divided in two parts, 102120 and 3123103, that added together give a palindrome (3225223).

The spelling of 1021203123103 in words is "one trillion, twenty-one billion, two hundred three million, one hundred twenty-three thousand, one hundred three".