30023220121 has 4 divisors (see below), whose sum is σ = 30471327952. Its totient is φ = 29575112292.

The previous prime is 30023220109. The next prime is 30023220167. The reversal of 30023220121 is 12102232003.

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, and also an emirpimes, since its reverse is a distinct semiprime: 12102232003 = 367 ⋅32976109.

It is a cyclic number.

It is not a de Polignac number, because 30023220121 - 2⁵ = 30023220089 is a prime.

It is a super-4 number, since 4×30023220121⁴ (a number of 43 digits) contains 4444 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 30023220095 and 30023220104.

It is not an unprimeable number, because it can be changed into a prime (30023220191) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 224053815 + ... + 224053948.

It is an arithmetic number, because the mean of its divisors is an integer number (7617831988).

Almost surely, 2^30023220121 is an apocalyptic number.

It is an amenable number.

30023220121 is a deficient number, since it is larger than the sum of its proper divisors (448107831).

30023220121 is an equidigital number, since it uses as much as digits as its factorization.

30023220121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 448107830.

The product of its (nonzero) digits is 144, while the sum is 16.

Adding to 30023220121 its reverse (12102232003), we get a palindrome (42125452124).

The spelling of 30023220121 in words is "thirty billion, twenty-three million, two hundred twenty thousand, one hundred twenty-one".