231122012212 has 96 divisors (see below), whose sum is σ = 500569574400. Its totient is φ = 90925535232.

The previous prime is 231122012179. The next prime is 231122012221. The reversal of 231122012212 is 212210221132.

231122012212 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 231122012212.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 87777648 + ... + 87780280.

It is an arithmetic number, because the mean of its divisors is an integer number (5214266400).

Almost surely, 2^231122012212 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 231122012212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (250284787200).

231122012212 is an abundant number, since it is smaller than the sum of its proper divisors (269447562188).

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

231122012212 is a wasteful number, since it uses less digits than its factorization.

231122012212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3905 (or 3903 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 19.

Adding to 231122012212 its reverse (212210221132), we get a palindrome (443332233344).

The spelling of 231122012212 in words is "two hundred thirty-one billion, one hundred twenty-two million, twelve thousand, two hundred twelve".