212000199989 has 2 divisors, whose sum is σ = 212000199990. Its totient is φ = 212000199988.

The previous prime is 212000199979. The next prime is 212000200033. The reversal of 212000199989 is 989991000212.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 106134563089 + 105865636900 = 325783^2 + 325370^2 .

It is a cyclic number.

It is not a de Polignac number, because 212000199989 - 2¹⁶ = 212000134453 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (212000199919) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106000099994 + 106000099995.

It is an arithmetic number, because the mean of its divisors is an integer number (106000099995).

Almost surely, 2^212000199989 is an apocalyptic number.

It is an amenable number.

212000199989 is a deficient number, since it is larger than the sum of its proper divisors (1).

212000199989 is an equidigital number, since it uses as much as digits as its factorization.

212000199989 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 209952, while the sum is 50.

The spelling of 212000199989 in words is "two hundred twelve billion, one hundred ninety-nine thousand, nine hundred eighty-nine".