212440342399 has 2 divisors, whose sum is σ = 212440342400. Its totient is φ = 212440342398.

The previous prime is 212440342297. The next prime is 212440342417. The reversal of 212440342399 is 993243044212.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 212440342399 - 2⁹ = 212440341887 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (212440342199) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106220171199 + 106220171200.

It is an arithmetic number, because the mean of its divisors is an integer number (106220171200).

Almost surely, 2^212440342399 is an apocalyptic number.

212440342399 is a deficient number, since it is larger than the sum of its proper divisors (1).

212440342399 is an equidigital number, since it uses as much as digits as its factorization.

212440342399 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 373248, while the sum is 43.

The spelling of 212440342399 in words is "two hundred twelve billion, four hundred forty million, three hundred forty-two thousand, three hundred ninety-nine".