30231232121009 has 2 divisors, whose sum is σ = 30231232121010. Its totient is φ = 30231232121008.

The previous prime is 30231232120997. The next prime is 30231232121119. The reversal of 30231232121009 is 90012123213203.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 28250851413409 + 1980380707600 = 5315153^2 + 1407260^2 .

It is an emirp because it is prime and its reverse (90012123213203) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 30231232121009 - 2⁴ = 30231232120993 is a prime.

It is not a weakly prime, because it can be changed into another prime (30231232121809) 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, 15115616060504 + 15115616060505.

It is an arithmetic number, because the mean of its divisors is an integer number (15115616060505).

Almost surely, 2^{30231232121009} is an apocalyptic number.

It is an amenable number.

30231232121009 is a deficient number, since it is larger than the sum of its proper divisors (1).

30231232121009 is an equidigital number, since it uses as much as digits as its factorization.

30231232121009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3888, while the sum is 29.

The spelling of 30231232121009 in words is "thirty trillion, two hundred thirty-one billion, two hundred thirty-two million, one hundred twenty-one thousand, nine".