30121331223 has 4 divisors (see below), whose sum is σ = 40161774968. Its totient is φ = 20080887480.

The previous prime is 30121331179. The next prime is 30121331239. The reversal of 30121331223 is 32213312103.

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

It is not a de Polignac number, because 30121331223 - 2¹² = 30121327127 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 30121331223.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30121331293) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5020221868 + ... + 5020221873.

It is an arithmetic number, because the mean of its divisors is an integer number (10040443742).

Almost surely, 2^30121331223 is an apocalyptic number.

30121331223 is a deficient number, since it is larger than the sum of its proper divisors (10040443745).

30121331223 is a wasteful number, since it uses less digits than its factorization.

30121331223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10040443744.

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

Adding to 30121331223 its reverse (32213312103), we get a palindrome (62334643326).

The spelling of 30121331223 in words is "thirty billion, one hundred twenty-one million, three hundred thirty-one thousand, two hundred twenty-three".