212201112047818 has 16 divisors (see below), whose sum is σ = 337025915834184. Its totient is φ = 99859163074560.

The previous prime is 212201112047803. The next prime is 212201112047819. The reversal of 212201112047818 is 818740211102212.

It can be written as a sum of positive squares in 4 ways, for example, as 105344297205169 + 106856814842649 = 10263737^2 + 10337157^2 .

It is a super-2 number, since 2×212201112047818² (a number of 29 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (212201112047819) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13986346 + ... + 24900202.

Almost surely, 2^{212201112047818} is an apocalyptic number.

212201112047818 is a deficient number, since it is larger than the sum of its proper divisors (124824803786366).

212201112047818 is a wasteful number, since it uses less digits than its factorization.

212201112047818 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11485737.

The product of its (nonzero) digits is 28672, while the sum is 40.

The spelling of 212201112047818 in words is "two hundred twelve trillion, two hundred one billion, one hundred twelve million, forty-seven thousand, eight hundred eighteen".