212320019 has 2 divisors, whose sum is σ = 212320020. Its totient is φ = 212320018.

The previous prime is 212320007. The next prime is 212320027. The reversal of 212320019 is 910023212.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 212320019 - 2⁸ = 212319763 is a prime.

It is a super-2 number, since 2×212320019² = 90159580936320722, which contains 22 as substring.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (212320219) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106160009 + 106160010.

It is an arithmetic number, because the mean of its divisors is an integer number (106160010).

Almost surely, 2^212320019 is an apocalyptic number.

212320019 is a deficient number, since it is larger than the sum of its proper divisors (1).

212320019 is an equidigital number, since it uses as much as digits as its factorization.

212320019 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 216, while the sum is 20.

The square root of 212320019 is about 14571.2051320404. The cubic root of 212320019 is about 596.5730744177.

The spelling of 212320019 in words is "two hundred twelve million, three hundred twenty thousand, nineteen".