30121223 has 8 divisors (see below), whose sum is σ = 33111936. Its totient is φ = 27172600.

The previous prime is 30121207. The next prime is 30121241. The reversal of 30121223 is 32212103.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 30121223 - 2⁴ = 30121207 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 30121198 and 30121207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30121523) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9011 + ... + 11892.

It is an arithmetic number, because the mean of its divisors is an integer number (4138992).

Almost surely, 2^30121223 is an apocalyptic number.

30121223 is a deficient number, since it is larger than the sum of its proper divisors (2990713).

30121223 is a wasteful number, since it uses less digits than its factorization.

30121223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21045.

The product of its (nonzero) digits is 72, while the sum is 14.

The square root of 30121223 is about 5488.2805139679. The cubic root of 30121223 is about 311.1412081947.

Adding to 30121223 its reverse (32212103), we get a palindrome (62333326).

The spelling of 30121223 in words is "thirty million, one hundred twenty-one thousand, two hundred twenty-three".