231211432122 has 96 divisors (see below), whose sum is σ = 515409048000. Its totient is φ = 69088673280.

The previous prime is 231211432097. The next prime is 231211432163. The reversal of 231211432122 is 221234112132.

It is a junction number, because it is equal to n+sod(n) for n = 231211432092 and 231211432101.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 15028498 + ... + 15043874.

It is an arithmetic number, because the mean of its divisors is an integer number (5368844250).

Almost surely, 2^231211432122 is an apocalyptic number.

231211432122 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 231211432122, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (257704524000).

231211432122 is an abundant number, since it is smaller than the sum of its proper divisors (284197615878).

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

231211432122 is a wasteful number, since it uses less digits than its factorization.

231211432122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15692 (or 15681 counting only the distinct ones).

The product of its digits is 1152, while the sum is 24.

Adding to 231211432122 its reverse (221234112132), we get a palindrome (452445544254).

The spelling of 231211432122 in words is "two hundred thirty-one billion, two hundred eleven million, four hundred thirty-two thousand, one hundred twenty-two".