1223031211 has 2 divisors, whose sum is σ = 1223031212. Its totient is φ = 1223031210.

The previous prime is 1223031149. The next prime is 1223031247. The reversal of 1223031211 is 1121303221.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1223031211 is a prime.

It is not a weakly prime, because it can be changed into another prime (1223031011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 611515605 + 611515606.

It is an arithmetic number, because the mean of its divisors is an integer number (611515606).

Almost surely, 2^1223031211 is an apocalyptic number.

1223031211 is a deficient number, since it is larger than the sum of its proper divisors (1).

1223031211 is an equidigital number, since it uses as much as digits as its factorization.

1223031211 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72, while the sum is 16.

The square root of 1223031211 is about 34971.8631330960. The cubic root of 1223031211 is about 1069.4139542691.

Adding to 1223031211 its reverse (1121303221), we get a palindrome (2344334432).

The spelling of 1223031211 in words is "one billion, two hundred twenty-three million, thirty-one thousand, two hundred eleven".