30121123104 has 96 divisors (see below), whose sum is σ = 91673043840. Its totient is φ = 9603830016.

The previous prime is 30121123103. The next prime is 30121123117. The reversal of 30121123104 is 40132112103.

It is a tau number, because it is divible by the number of its divisors (96).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (30121123103) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 738007 + ... + 777750.

It is an arithmetic number, because the mean of its divisors is an integer number (954927540).

Almost surely, 2^30121123104 is an apocalyptic number.

It is an amenable number.

30121123104 is an abundant number, since it is smaller than the sum of its proper divisors (61551920736).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

30121123104 is a wasteful number, since it uses less digits than its factorization.

30121123104 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1515799 (or 1515785 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 30121123104 its reverse (40132112103), we get a palindrome (70253235207).

The spelling of 30121123104 in words is "thirty billion, one hundred twenty-one million, one hundred twenty-three thousand, one hundred four".