30423121 has 4 divisors (see below), whose sum is σ = 31404544. Its totient is φ = 29441700.

The previous prime is 30423109. The next prime is 30423131. The reversal of 30423121 is 12132403.

It is a happy number.

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: 12132403 = 1039 ⋅11677.

It is a cyclic number.

It is not a de Polignac number, because 30423121 - 2⁷ = 30422993 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 30423095 and 30423104.

It is not an unprimeable number, because it can be changed into a prime (30423131) 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, 490665 + ... + 490726.

It is an arithmetic number, because the mean of its divisors is an integer number (7851136).

Almost surely, 2^30423121 is an apocalyptic number.

30423121 is a gapful number since it is divisible by the number (31) formed by its first and last digit.

30423121 is the 3185-th hex number.

It is an amenable number.

30423121 is a deficient number, since it is larger than the sum of its proper divisors (981423).

30423121 is an equidigital number, since it uses as much as digits as its factorization.

30423121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 981422.

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

The square root of 30423121 is about 5515.7158193656. The cubic root of 30423121 is about 312.1772531317.

Adding to 30423121 its reverse (12132403), we get a palindrome (42555524).

The spelling of 30423121 in words is "thirty million, four hundred twenty-three thousand, one hundred twenty-one".