212865749291 has 16 divisors (see below), whose sum is σ = 241356746400. Its totient is φ = 186110120448.

The previous prime is 212865749281. The next prime is 212865749323. The reversal of 212865749291 is 192947568212.

212865749291 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 212865749291 - 2⁶ = 212865749227 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (212865749231) 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 15 ways as a sum of consecutive naturals, for example, 1100345 + ... + 1279253.

It is an arithmetic number, because the mean of its divisors is an integer number (15084796650).

Almost surely, 2^212865749291 is an apocalyptic number.

212865749291 is a deficient number, since it is larger than the sum of its proper divisors (28490997109).

212865749291 is a wasteful number, since it uses less digits than its factorization.

212865749291 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 183758.

The product of its digits is 4354560, while the sum is 56.

The spelling of 212865749291 in words is "two hundred twelve billion, eight hundred sixty-five million, seven hundred forty-nine thousand, two hundred ninety-one".