212661787118 has 32 divisors (see below), whose sum is σ = 354606446592. Its totient is φ = 94840977600.

The previous prime is 212661787109. The next prime is 212661787133. The reversal of 212661787118 is 811787166212.

It is a happy number.

212661787118 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 15 ways as a sum of consecutive naturals, for example, 39896 + ... + 653387.

It is an arithmetic number, because the mean of its divisors is an integer number (11081451456).

Almost surely, 2^212661787118 is an apocalyptic number.

212661787118 is a deficient number, since it is larger than the sum of its proper divisors (141944659474).

212661787118 is a wasteful number, since it uses less digits than its factorization.

212661787118 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 693560.

The product of its digits is 451584, while the sum is 50.

The spelling of 212661787118 in words is "two hundred twelve billion, six hundred sixty-one million, seven hundred eighty-seven thousand, one hundred eighteen".