212000201209 has 2 divisors, whose sum is σ = 212000201210. Its totient is φ = 212000201208.

The previous prime is 212000201201. The next prime is 212000201233. The reversal of 212000201209 is 902102000212.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 159817651984 + 52182549225 = 399772^2 + 228435^2 .

It is a cyclic number.

It is not a de Polignac number, because 212000201209 - 2³ = 212000201201 is a prime.

It is not a weakly prime, because it can be changed into another prime (212000201201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106000100604 + 106000100605.

It is an arithmetic number, because the mean of its divisors is an integer number (106000100605).

Almost surely, 2^212000201209 is an apocalyptic number.

It is an amenable number.

212000201209 is a deficient number, since it is larger than the sum of its proper divisors (1).

212000201209 is an equidigital number, since it uses as much as digits as its factorization.

212000201209 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 144, while the sum is 19.

The spelling of 212000201209 in words is "two hundred twelve billion, two hundred one thousand, two hundred nine".