30123210012 has 108 divisors (see below), whose sum is σ = 84487180680. Its totient is φ = 8328841920.

The previous prime is 30123209953. The next prime is 30123210037. The reversal of 30123210012 is 21001232103.

It is a junction number, because it is equal to n+sod(n) for n = 30123209973 and 30123210000.

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 35 ways as a sum of consecutive naturals, for example, 538414 + ... + 591722.

It is an arithmetic number, because the mean of its divisors is an integer number (782288710).

Almost surely, 2^30123210012 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 30123210012, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (42243590340).

30123210012 is an abundant number, since it is smaller than the sum of its proper divisors (54363970668).

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

30123210012 is a wasteful number, since it uses less digits than its factorization.

30123210012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53392 (or 53352 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 15.

Adding to 30123210012 its reverse (21001232103), we get a palindrome (51124442115).

The spelling of 30123210012 in words is "thirty billion, one hundred twenty-three million, two hundred ten thousand, twelve".