1232211209 has 2 divisors, whose sum is σ = 1232211210. Its totient is φ = 1232211208.

The previous prime is 1232211193. The next prime is 1232211229. The reversal of 1232211209 is 9021122321.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1047169600 + 185041609 = 32360^2 + 13603^2 .

It is an emirp because it is prime and its reverse (9021122321) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1232211209 - 2⁴ = 1232211193 is a prime.

It is not a weakly prime, because it can be changed into another prime (1232211229) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 616105604 + 616105605.

It is an arithmetic number, because the mean of its divisors is an integer number (616105605).

Almost surely, 2^1232211209 is an apocalyptic number.

It is an amenable number.

1232211209 is a deficient number, since it is larger than the sum of its proper divisors (1).

1232211209 is an equidigital number, since it uses as much as digits as its factorization.

1232211209 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 23.

The square root of 1232211209 is about 35102.8661080545. The cubic root of 1232211209 is about 1072.0829396849.

The spelling of 1232211209 in words is "one billion, two hundred thirty-two million, two hundred eleven thousand, two hundred nine".