1212232009 has 2 divisors, whose sum is σ = 1212232010. Its totient is φ = 1212232008.

The previous prime is 1212232003. The next prime is 1212232013. The reversal of 1212232009 is 9002322121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 699073600 + 513158409 = 26440^2 + 22653^2 .

It is a cyclic number.

It is not a de Polignac number, because 1212232009 - 2³ = 1212232001 is a prime.

It is not a weakly prime, because it can be changed into another prime (1212232001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 606116004 + 606116005.

It is an arithmetic number, because the mean of its divisors is an integer number (606116005).

Almost surely, 2^1212232009 is an apocalyptic number.

It is an amenable number.

1212232009 is a deficient number, since it is larger than the sum of its proper divisors (1).

1212232009 is an equidigital number, since it uses as much as digits as its factorization.

1212232009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 432, while the sum is 22.

The square root of 1212232009 is about 34817.1223538075. The cubic root of 1212232009 is about 1066.2570502189.

The spelling of 1212232009 in words is "one billion, two hundred twelve million, two hundred thirty-two thousand, nine".