30123121 has 4 divisors (see below), whose sum is σ = 34426432. Its totient is φ = 25819812.

The previous prime is 30123109. The next prime is 30123139. The reversal of 30123121 is 12132103.

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 30123121 - 2⁵ = 30123089 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (30127121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2151645 + ... + 2151658.

It is an arithmetic number, because the mean of its divisors is an integer number (8606608).

Almost surely, 2^30123121 is an apocalyptic number.

It is an amenable number.

30123121 is a deficient number, since it is larger than the sum of its proper divisors (4303311).

30123121 is an equidigital number, since it uses as much as digits as its factorization.

30123121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4303310.

The product of its (nonzero) digits is 36, while the sum is 13.

The square root of 30123121 is about 5488.4534251463. The cubic root of 30123121 is about 311.1477432725.

Adding to 30123121 its reverse (12132103), we get a palindrome (42255224).

The spelling of 30123121 in words is "thirty million, one hundred twenty-three thousand, one hundred twenty-one".