30432121 has 4 divisors (see below), whose sum is σ = 30671872. Its totient is φ = 30192372.

The previous prime is 30432119. The next prime is 30432133. The reversal of 30432121 is 12123403.

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: 12123403 = 631 ⋅19213.

It is a cyclic number.

It is not a de Polignac number, because 30432121 - 2¹ = 30432119 is a prime.

It is a super-2 number, since 2×30432121² = 1852227977117282, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 30432095 and 30432104.

It is not an unprimeable number, because it can be changed into a prime (30432161) 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, 119685 + ... + 119938.

It is an arithmetic number, because the mean of its divisors is an integer number (7667968).

Almost surely, 2^30432121 is an apocalyptic number.

It is an amenable number.

30432121 is a deficient number, since it is larger than the sum of its proper divisors (239751).

30432121 is a wasteful number, since it uses less digits than its factorization.

30432121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 239750.

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

The square root of 30432121 is about 5516.5316096257. The cubic root of 30432121 is about 312.2080336497.

Adding to 30432121 its reverse (12123403), we get a palindrome (42555524).

The spelling of 30432121 in words is "thirty million, four hundred thirty-two thousand, one hundred twenty-one".