212018905871 has 2 divisors, whose sum is σ = 212018905872. Its totient is φ = 212018905870.

The previous prime is 212018905853. The next prime is 212018905919. The reversal of 212018905871 is 178509810212.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 212018905871 - 2²⁶ = 211951797007 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (212018905811) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106009452935 + 106009452936.

It is an arithmetic number, because the mean of its divisors is an integer number (106009452936).

Almost surely, 2^212018905871 is an apocalyptic number.

212018905871 is a deficient number, since it is larger than the sum of its proper divisors (1).

212018905871 is an equidigital number, since it uses as much as digits as its factorization.

212018905871 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 80640, while the sum is 44.

The spelling of 212018905871 in words is "two hundred twelve billion, eighteen million, nine hundred five thousand, eight hundred seventy-one".