30123110221 has 4 divisors (see below), whose sum is σ = 30823647712. Its totient is φ = 29422572732.

The previous prime is 30123110209. The next prime is 30123110267. The reversal of 30123110221 is 12201132103.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 30123110221 - 2¹¹ = 30123108173 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 30123110195 and 30123110204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30123110201) 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, 350268681 + ... + 350268766.

It is an arithmetic number, because the mean of its divisors is an integer number (7705911928).

Almost surely, 2^30123110221 is an apocalyptic number.

It is an amenable number.

30123110221 is a deficient number, since it is larger than the sum of its proper divisors (700537491).

30123110221 is an equidigital number, since it uses as much as digits as its factorization.

30123110221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 700537490.

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 30123110221 its reverse (12201132103), we get a palindrome (42324242324).

The spelling of 30123110221 in words is "thirty billion, one hundred twenty-three million, one hundred ten thousand, two hundred twenty-one".