30123100125 has 56 divisors (see below), whose sum is σ = 56364829560. Its totient is φ = 16065604800.

The previous prime is 30123100109. The next prime is 30123100157. The reversal of 30123100125 is 52100132103.

It can be written as a sum of positive squares in 4 ways, for example, as 9311864004 + 20811236121 = 96498^2 + 144261^2 .

It is not a de Polignac number, because 30123100125 - 2⁴ = 30123100109 is a prime.

It is a super-2 number, since 2×30123100125² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 30123100098 and 30123100107.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 55 ways as a sum of consecutive naturals, for example, 74160 + ... + 256409.

Almost surely, 2^30123100125 is an apocalyptic number.

It is an amenable number.

30123100125 is a deficient number, since it is larger than the sum of its proper divisors (26241729435).

30123100125 is an frugal number, since it uses more digits than its factorization.

30123100125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 330602 (or 330577 counting only the distinct ones).

The product of its (nonzero) digits is 180, while the sum is 18.

Adding to 30123100125 its reverse (52100132103), we get a palindrome (82223232228).

The spelling of 30123100125 in words is "thirty billion, one hundred twenty-three million, one hundred thousand, one hundred twenty-five".