211758957212 has 24 divisors (see below), whose sum is σ = 411119089920. Its totient is φ = 94622645360.

The previous prime is 211758957211. The next prime is 211758957229. The reversal of 211758957212 is 212759857112.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211758957211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 40783028 + ... + 40788219.

It is an arithmetic number, because the mean of its divisors is an integer number (17129962080).

Almost surely, 2^211758957212 is an apocalyptic number.

211758957212 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

211758957212 is a deficient number, since it is larger than the sum of its proper divisors (199360132708).

211758957212 is a wasteful number, since it uses less digits than its factorization.

211758957212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81571321 (or 81571319 counting only the distinct ones).

The product of its digits is 705600, while the sum is 50.

The spelling of 211758957212 in words is "two hundred eleven billion, seven hundred fifty-eight million, nine hundred fifty-seven thousand, two hundred twelve".