30121012223 has 4 divisors (see below), whose sum is σ = 30126922248. Its totient is φ = 30115102200.

The previous prime is 30121012193. The next prime is 30121012231. The reversal of 30121012223 is 32221012103.

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-30121012223 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30121212223) 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, 2947361 + ... + 2957562.

It is an arithmetic number, because the mean of its divisors is an integer number (7531730562).

Almost surely, 2^30121012223 is an apocalyptic number.

30121012223 is a deficient number, since it is larger than the sum of its proper divisors (5910025).

30121012223 is an equidigital number, since it uses as much as digits as its factorization.

30121012223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5910024.

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 30121012223 its reverse (32221012103), we get a palindrome (62342024326).

The spelling of 30121012223 in words is "thirty billion, one hundred twenty-one million, twelve thousand, two hundred twenty-three".