30331212123 has 4 divisors (see below), whose sum is σ = 40441616168. Its totient is φ = 20220808080.

The previous prime is 30331212097. The next prime is 30331212127. The reversal of 30331212123 is 32121213303.

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

It is not a de Polignac number, because 30331212123 - 2⁵ = 30331212091 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 30331212123.

It is not an unprimeable number, because it can be changed into a prime (30331212127) 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, 5055202018 + ... + 5055202023.

It is an arithmetic number, because the mean of its divisors is an integer number (10110404042).

Almost surely, 2^30331212123 is an apocalyptic number.

30331212123 is a deficient number, since it is larger than the sum of its proper divisors (10110404045).

30331212123 is a wasteful number, since it uses less digits than its factorization.

30331212123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10110404044.

The product of its (nonzero) digits is 648, while the sum is 21.

Adding to 30331212123 its reverse (32121213303), we get a palindrome (62452425426).

The spelling of 30331212123 in words is "thirty billion, three hundred thirty-one million, two hundred twelve thousand, one hundred twenty-three".