30231212009 has 2 divisors, whose sum is σ = 30231212010. Its totient is φ = 30231212008.

The previous prime is 30231211981. The next prime is 30231212057. The reversal of 30231212009 is 90021213203.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 27703938025 + 2527273984 = 166445^2 + 50272^2 .

It is a cyclic number.

It is not a de Polignac number, because 30231212009 - 2²⁴ = 30214434793 is a prime.

It is not a weakly prime, because it can be changed into another prime (30231212069) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15115606004 + 15115606005.

It is an arithmetic number, because the mean of its divisors is an integer number (15115606005).

Almost surely, 2^30231212009 is an apocalyptic number.

It is an amenable number.

30231212009 is a deficient number, since it is larger than the sum of its proper divisors (1).

30231212009 is an equidigital number, since it uses as much as digits as its factorization.

30231212009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 648, while the sum is 23.

The spelling of 30231212009 in words is "thirty billion, two hundred thirty-one million, two hundred twelve thousand, nine".