231122435412 has 144 divisors (see below), whose sum is σ = 598378576320. Its totient is φ = 69376581120.

The previous prime is 231122435389. The next prime is 231122435429. The reversal of 231122435412 is 214534221132.

It is a happy number.

It is a super-2 number, since 2×231122435412² (a number of 24 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 231122435412.

It is a congruent number.

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, 123133018 + ... + 123134894.

It is an arithmetic number, because the mean of its divisors is an integer number (4155406780).

Almost surely, 2^231122435412 is an apocalyptic number.

231122435412 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 231122435412, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (299189288160).

231122435412 is an abundant number, since it is smaller than the sum of its proper divisors (367256140908).

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

231122435412 is a wasteful number, since it uses less digits than its factorization.

231122435412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2662 (or 2649 counting only the distinct ones).

The product of its digits is 11520, while the sum is 30.

Adding to 231122435412 its reverse (214534221132), we get a palindrome (445656656544).

The spelling of 231122435412 in words is "two hundred thirty-one billion, one hundred twenty-two million, four hundred thirty-five thousand, four hundred twelve".