30243121 has 2 divisors, whose sum is σ = 30243122. Its totient is φ = 30243120.

The previous prime is 30243107. The next prime is 30243127. The reversal of 30243121 is 12134203.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16516096 + 13727025 = 4064^2 + 3705^2 .

It is an emirp because it is prime and its reverse (12134203) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 30243121 - 2¹¹ = 30241073 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 30243095 and 30243104.

It is not a weakly prime, because it can be changed into another prime (30243127) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15121560 + 15121561.

It is an arithmetic number, because the mean of its divisors is an integer number (15121561).

Almost surely, 2^30243121 is an apocalyptic number.

It is an amenable number.

30243121 is a deficient number, since it is larger than the sum of its proper divisors (1).

30243121 is an equidigital number, since it uses as much as digits as its factorization.

30243121 is an evil number, because the sum of its binary digits is even.

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

The square root of 30243121 is about 5499.3746008069. The cubic root of 30243121 is about 311.5603638469.

Adding to 30243121 its reverse (12134203), we get a palindrome (42377324).

The spelling of 30243121 in words is "thirty million, two hundred forty-three thousand, one hundred twenty-one".