30121123103 has 2 divisors, whose sum is σ = 30121123104. Its totient is φ = 30121123102.

The previous prime is 30121123091. The next prime is 30121123117. The reversal of 30121123103 is 30132112103.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 30121123103 - 2¹⁰ = 30121122079 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (30121123183) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15060561551 + 15060561552.

It is an arithmetic number, because the mean of its divisors is an integer number (15060561552).

Almost surely, 2^30121123103 is an apocalyptic number.

30121123103 is a deficient number, since it is larger than the sum of its proper divisors (1).

30121123103 is an equidigital number, since it uses as much as digits as its factorization.

30121123103 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 108, while the sum is 17.

Adding to 30121123103 its reverse (30132112103), we get a palindrome (60253235206).

The spelling of 30121123103 in words is "thirty billion, one hundred twenty-one million, one hundred twenty-three thousand, one hundred three".