231222222133 has 4 divisors (see below), whose sum is σ = 264253968160. Its totient is φ = 198190476108.

The previous prime is 231222222107. The next prime is 231222222137. The reversal of 231222222133 is 331222222132.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-231222222133 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 231222222098 and 231222222107.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231222222137) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16515873003 + ... + 16515873016.

It is an arithmetic number, because the mean of its divisors is an integer number (66063492040).

Almost surely, 2^231222222133 is an apocalyptic number.

It is an amenable number.

231222222133 is a deficient number, since it is larger than the sum of its proper divisors (33031746027).

231222222133 is an equidigital number, since it uses as much as digits as its factorization.

231222222133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33031746026.

The product of its digits is 3456, while the sum is 25.

Adding to 231222222133 its reverse (331222222132), we get a palindrome (562444444265).

Subtracting 231222222133 from its reverse (331222222132), we obtain a palindrome (99999999999).

The spelling of 231222222133 in words is "two hundred thirty-one billion, two hundred twenty-two million, two hundred twenty-two thousand, one hundred thirty-three".