1231222339 has 2 divisors, whose sum is σ = 1231222340. Its totient is φ = 1231222338.

The previous prime is 1231222283. The next prime is 1231222367. The reversal of 1231222339 is 9332221321.

It is an a-pointer prime, because the next prime (1231222367) can be obtained adding 1231222339 to its sum of digits (28).

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1231222339 - 2¹³ = 1231214147 is a prime.

It is not a weakly prime, because it can be changed into another prime (1231225339) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 615611169 + 615611170.

It is an arithmetic number, because the mean of its divisors is an integer number (615611170).

Almost surely, 2^1231222339 is an apocalyptic number.

1231222339 is a deficient number, since it is larger than the sum of its proper divisors (1).

1231222339 is an equidigital number, since it uses as much as digits as its factorization.

1231222339 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3888, while the sum is 28.

The square root of 1231222339 is about 35088.7779639018. Note that the first 3 decimals coincide. The cubic root of 1231222339 is about 1071.7960748002.

The spelling of 1231222339 in words is "one billion, two hundred thirty-one million, two hundred twenty-two thousand, three hundred thirty-nine".