100530550123 has 4 divisors (see below), whose sum is σ = 100531185048. Its totient is φ = 100529915200.

The previous prime is 100530550093. The next prime is 100530550129. The reversal of 100530550123 is 321055035001.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 100530550123 - 2⁹ = 100530549611 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (100530550129) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 134940 + ... + 468262.

It is an arithmetic number, because the mean of its divisors is an integer number (25132796262).

Almost surely, 2^100530550123 is an apocalyptic number.

100530550123 is a deficient number, since it is larger than the sum of its proper divisors (634925).

100530550123 is an equidigital number, since it uses as much as digits as its factorization.

100530550123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 634924.

The product of its (nonzero) digits is 2250, while the sum is 25.

Adding to 100530550123 its reverse (321055035001), we get a palindrome (421585585124).

The spelling of 100530550123 in words is "one hundred billion, five hundred thirty million, five hundred fifty thousand, one hundred twenty-three".