231101223132 has 96 divisors (see below), whose sum is σ = 615883044672. Its totient is φ = 66815594496.

The previous prime is 231101223127. The next prime is 231101223139. The reversal of 231101223132 is 231322101132.

It is a junction number, because it is equal to n+sod(n) for n = 231101223099 and 231101223108.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231101223139) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1554598 + ... + 1696754.

It is an arithmetic number, because the mean of its divisors is an integer number (6415448382).

Almost surely, 2^231101223132 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 231101223132, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (307941522336).

231101223132 is an abundant number, since it is smaller than the sum of its proper divisors (384781821540).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

231101223132 is a wasteful number, since it uses less digits than its factorization.

231101223132 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 142807 (or 142805 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 21.

Adding to 231101223132 its reverse (231322101132), we get a palindrome (462423324264).

The spelling of 231101223132 in words is "two hundred thirty-one billion, one hundred one million, two hundred twenty-three thousand, one hundred thirty-two".