233131212212 has 24 divisors (see below), whose sum is σ = 409818448200. Its totient is φ = 116040370176.

The previous prime is 233131212187. The next prime is 233131212217. The reversal of 233131212212 is 212212131332.

It can be written as a sum of positive squares in 4 ways, for example, as 39245987236 + 193885224976 = 198106^2 + 440324^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (233131212217) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9082148 + ... + 9107780.

It is an arithmetic number, because the mean of its divisors is an integer number (17075768675).

Almost surely, 2^233131212212 is an apocalyptic number.

It is an amenable number.

233131212212 is a deficient number, since it is larger than the sum of its proper divisors (176687235988).

233131212212 is a wasteful number, since it uses less digits than its factorization.

233131212212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35795 (or 35793 counting only the distinct ones).

The product of its digits is 864, while the sum is 23.

Adding to 233131212212 its reverse (212212131332), we get a palindrome (445343343544).

The spelling of 233131212212 in words is "two hundred thirty-three billion, one hundred thirty-one million, two hundred twelve thousand, two hundred twelve".