30231232121 has 2 divisors, whose sum is σ = 30231232122. Its totient is φ = 30231232120.

The previous prime is 30231232103. The next prime is 30231232127. The reversal of 30231232121 is 12123213203.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 22993476496 + 7237755625 = 151636^2 + 85075^2 .

It is a cyclic number.

It is not a de Polignac number, because 30231232121 - 2¹⁰ = 30231231097 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 30231232093 and 30231232102.

It is not a weakly prime, because it can be changed into another prime (30231232127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15115616060 + 15115616061.

It is an arithmetic number, because the mean of its divisors is an integer number (15115616061).

Almost surely, 2^30231232121 is an apocalyptic number.

It is an amenable number.

30231232121 is a deficient number, since it is larger than the sum of its proper divisors (1).

30231232121 is an equidigital number, since it uses as much as digits as its factorization.

30231232121 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 30231232121 its reverse (12123213203), we get a palindrome (42354445324).

It can be divided in two parts, 302312 and 32121, that added together give a palindrome (334433).

The spelling of 30231232121 in words is "thirty billion, two hundred thirty-one million, two hundred thirty-two thousand, one hundred twenty-one".