30321121 has 2 divisors, whose sum is σ = 30321122. Its totient is φ = 30321120.

The previous prime is 30321119. The next prime is 30321127. The reversal of 30321121 is 12112303.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 26061025 + 4260096 = 5105^2 + 2064^2 .

It is a cyclic number.

It is not a de Polignac number, because 30321121 - 2¹ = 30321119 is a prime.

Together with 30321119, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (30321127) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15160560 + 15160561.

It is an arithmetic number, because the mean of its divisors is an integer number (15160561).

Almost surely, 2^30321121 is an apocalyptic number.

It is an amenable number.

30321121 is a deficient number, since it is larger than the sum of its proper divisors (1).

30321121 is an equidigital number, since it uses as much as digits as its factorization.

30321121 is an evil number, because the sum of its binary digits is even.

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

The square root of 30321121 is about 5506.4617496174. The cubic root of 30321121 is about 311.8279822374.

Adding to 30321121 its reverse (12112303), we get a palindrome (42433424).

The spelling of 30321121 in words is "thirty million, three hundred twenty-one thousand, one hundred twenty-one".