1233213111 has 18 divisors (see below), whose sum is σ = 1928874168. Its totient is φ = 758899440.

The previous prime is 1233213101. The next prime is 1233213151. The reversal of 1233213111 is 1113123321.

It is not a de Polignac number, because 1233213111 - 2⁷ = 1233212983 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1233213101) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 403875 + ... + 406916.

It is an arithmetic number, because the mean of its divisors is an integer number (107159676).

Almost surely, 2^1233213111 is an apocalyptic number.

1233213111 is a deficient number, since it is larger than the sum of its proper divisors (695661057).

1233213111 is a wasteful number, since it uses less digits than its factorization.

1233213111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 810823 (or 810807 counting only the distinct ones).

The product of its digits is 108, while the sum is 18.

The square root of 1233213111 is about 35117.1341512943. The cubic root of 1233213111 is about 1072.3734285894.

Adding to 1233213111 its reverse (1113123321), we get a palindrome (2346336432).

The spelling of 1233213111 in words is "one billion, two hundred thirty-three million, two hundred thirteen thousand, one hundred eleven".