1223231211 has 12 divisors (see below), whose sum is σ = 1814643792. Its totient is φ = 793447056.

The previous prime is 1223231203. The next prime is 1223231221. The reversal of 1223231211 is 1121323221.

1223231211 is a `hidden beast` number, since 1 + 223 + 231 + 211 = 666.

It is not a de Polignac number, because 1223231211 - 2³ = 1223231203 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1223231221) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1836351 + ... + 1837016.

It is an arithmetic number, because the mean of its divisors is an integer number (151220316).

Almost surely, 2^1223231211 is an apocalyptic number.

1223231211 is a deficient number, since it is larger than the sum of its proper divisors (591412581).

1223231211 is a wasteful number, since it uses less digits than its factorization.

1223231211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3673410 (or 3673407 counting only the distinct ones).

The product of its digits is 144, while the sum is 18.

The square root of 1223231211 is about 34974.7224577980. The cubic root of 1223231211 is about 1069.4722441779.

Adding to 1223231211 its reverse (1121323221), we get a palindrome (2344554432).

The spelling of 1223231211 in words is "one billion, two hundred twenty-three million, two hundred thirty-one thousand, two hundred eleven".