212071492816 has 20 divisors (see below), whose sum is σ = 421993613572. Its totient is φ = 103169915136.

The previous prime is 212071492799. The next prime is 212071492817. The reversal of 212071492816 is 618294170212.

It can be written as a sum of positive squares in 2 ways, for example, as 123805459600 + 88266033216 = 351860^2 + 297096^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212071492817) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 179113845 + ... + 179115028.

Almost surely, 2^212071492816 is an apocalyptic number.

It is an amenable number.

212071492816 is a deficient number, since it is larger than the sum of its proper divisors (209922120756).

212071492816 is a wasteful number, since it uses less digits than its factorization.

212071492816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 358228918 (or 358228912 counting only the distinct ones).

The product of its (nonzero) digits is 96768, while the sum is 43.

The spelling of 212071492816 in words is "two hundred twelve billion, seventy-one million, four hundred ninety-two thousand, eight hundred sixteen".