212120131246 has 16 divisors (see below), whose sum is σ = 349488547200. Its totient is φ = 96109349688.

The previous prime is 212120131121. The next prime is 212120131247. The reversal of 212120131246 is 642131021212.

212120131246 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 212120131246.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212120131247) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 121349316 + ... + 121351063.

It is an arithmetic number, because the mean of its divisors is an integer number (21843034200).

Almost surely, 2^212120131246 is an apocalyptic number.

212120131246 is a deficient number, since it is larger than the sum of its proper divisors (137368415954).

212120131246 is a wasteful number, since it uses less digits than its factorization.

212120131246 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 242700423.

The product of its (nonzero) digits is 1152, while the sum is 25.

Adding to 212120131246 its reverse (642131021212), we get a palindrome (854251152458).

The spelling of 212120131246 in words is "two hundred twelve billion, one hundred twenty million, one hundred thirty-one thousand, two hundred forty-six".