30123331123 has 4 divisors (see below), whose sum is σ = 30125294928. Its totient is φ = 30121367320.

The previous prime is 30123331111. The next prime is 30123331151. The reversal of 30123331123 is 32113332103.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 32113332103 = 64969 ⋅494287.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-30123331123 is a prime.

It is a super-2 number, since 2×30123331123² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 30123331094 and 30123331103.

It is not an unprimeable number, because it can be changed into a prime (30123334123) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 958711 + ... + 989632.

It is an arithmetic number, because the mean of its divisors is an integer number (7531323732).

Almost surely, 2^30123331123 is an apocalyptic number.

30123331123 is a deficient number, since it is larger than the sum of its proper divisors (1963805).

30123331123 is a wasteful number, since it uses less digits than its factorization.

30123331123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1963804.

The product of its (nonzero) digits is 972, while the sum is 22.

Adding to 30123331123 its reverse (32113332103), we get a palindrome (62236663226).

The spelling of 30123331123 in words is "thirty billion, one hundred twenty-three million, three hundred thirty-one thousand, one hundred twenty-three".