30031123109 has 4 divisors (see below), whose sum is σ = 32341209516. Its totient is φ = 27721036704.

The previous prime is 30031123091. The next prime is 30031123141. The reversal of 30031123109 is 90132113003.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 18565425025 + 11465698084 = 136255^2 + 107078^2 .

It is a cyclic number.

It is not a de Polignac number, because 30031123109 - 2²⁸ = 29762687653 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30031183109) 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 in 3 ways as a sum of consecutive naturals, for example, 1155043184 + ... + 1155043209.

It is an arithmetic number, because the mean of its divisors is an integer number (8085302379).

Almost surely, 2^30031123109 is an apocalyptic number.

It is an amenable number.

30031123109 is a deficient number, since it is larger than the sum of its proper divisors (2310086407).

30031123109 is a wasteful number, since it uses less digits than its factorization.

30031123109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2310086406.

The product of its (nonzero) digits is 486, while the sum is 23.

The spelling of 30031123109 in words is "thirty billion, thirty-one million, one hundred twenty-three thousand, one hundred nine".