30331213123 has 4 divisors (see below), whose sum is σ = 30334466800. Its totient is φ = 30327959448.

The previous prime is 30331213117. The next prime is 30331213127. The reversal of 30331213123 is 32131213303.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-30331213123 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 30331213094 and 30331213103.

It is not an unprimeable number, because it can be changed into a prime (30331213127) 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, 1612815 + ... + 1631512.

It is an arithmetic number, because the mean of its divisors is an integer number (7583616700).

Almost surely, 2^30331213123 is an apocalyptic number.

30331213123 is a deficient number, since it is larger than the sum of its proper divisors (3253677).

30331213123 is an equidigital number, since it uses as much as digits as its factorization.

30331213123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3253676.

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

Adding to 30331213123 its reverse (32131213303), we get a palindrome (62462426426).

The spelling of 30331213123 in words is "thirty billion, three hundred thirty-one million, two hundred thirteen thousand, one hundred twenty-three".