231222212133 has 48 divisors (see below), whose sum is σ = 342503515200. Its totient is φ = 138634848000.

The previous prime is 231222212113. The next prime is 231222212173. The reversal of 231222212133 is 331212222132.

It is not a de Polignac number, because 231222212133 - 2²¹ = 231220114981 is a prime.

It is a super-2 number, since 2×231222212133² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231222212113) 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 47 ways as a sum of consecutive naturals, for example, 76587498 + ... + 76590516.

It is an arithmetic number, because the mean of its divisors is an integer number (7135489900).

Almost surely, 2^231222212133 is an apocalyptic number.

It is an amenable number.

231222212133 is a deficient number, since it is larger than the sum of its proper divisors (111281303067).

231222212133 is a wasteful number, since it uses less digits than its factorization.

231222212133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5234 (or 5223 counting only the distinct ones).

The product of its digits is 1728, while the sum is 24.

Adding to 231222212133 its reverse (331212222132), we get a palindrome (562434434265).

Subtracting 231222212133 from its reverse (331212222132), we obtain a palindrome (99990009999).

It can be divided in two parts, 2312 and 22212133, that added together give a triangular number (22214445 = T₆₆₆₅).

The spelling of 231222212133 in words is "two hundred thirty-one billion, two hundred twenty-two million, two hundred twelve thousand, one hundred thirty-three".