231111001000212 has 384 divisors, whose sum is σ = 618748932587520. Its totient is φ = 66794969088000.

The previous prime is 231111001000133. The next prime is 231111001000237. The reversal of 231111001000212 is 212000100111132.

It is a junction number, because it is equal to n+sod(n) for n = 231111001000191 and 231111001000200.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 2905664508 + ... + 2905744044.

It is an arithmetic number, because the mean of its divisors is an integer number (1611325345280).

Almost surely, 2^{231111001000212} 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 231111001000212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (309374466293760).

231111001000212 is an abundant number, since it is smaller than the sum of its proper divisors (387637931587308).

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

231111001000212 is a wasteful number, since it uses less digits than its factorization.

231111001000212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79943 (or 79941 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 15.

Adding to 231111001000212 its reverse (212000100111132), we get a palindrome (443111101111344).

The spelling of 231111001000212 in words is "two hundred thirty-one trillion, one hundred eleven billion, one million, two hundred twelve", and thus it is an aban number.