212440054856663 has 2 divisors, whose sum is σ = 212440054856664. Its totient is φ = 212440054856662.

The previous prime is 212440054856657. The next prime is 212440054856719. The reversal of 212440054856663 is 366658450044212.

212440054856663 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an a-pointer prime, because the next prime (212440054856719) can be obtained adding 212440054856663 to its sum of digits (56).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 212440054856663 - 2⁴ = 212440054856647 is a prime.

It is a Sophie Germain prime.

It is a junction number, because it is equal to n+sod(n) for n = 212440054856599 and 212440054856608.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (212440054826663) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106220027428331 + 106220027428332.

It is an arithmetic number, because the mean of its divisors is an integer number (106220027428332).

Almost surely, 2^{212440054856663} is an apocalyptic number.

212440054856663 is a deficient number, since it is larger than the sum of its proper divisors (1).

212440054856663 is an equidigital number, since it uses as much as digits as its factorization.

212440054856663 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 33177600, while the sum is 56.

The spelling of 212440054856663 in words is "two hundred twelve trillion, four hundred forty billion, fifty-four million, eight hundred fifty-six thousand, six hundred sixty-three".