212011001212009 has 2 divisors, whose sum is σ = 212011001212010. Its totient is φ = 212011001212008.

The previous prime is 212011001212007. The next prime is 212011001212013. The reversal of 212011001212009 is 900212100110212.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 145818376478784 + 66192624733225 = 12075528^2 + 8135885^2 .

It is a cyclic number.

It is not a de Polignac number, because 212011001212009 - 2¹ = 212011001212007 is a prime.

Together with 212011001212007, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (212011001212007) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106005500606004 + 106005500606005.

It is an arithmetic number, because the mean of its divisors is an integer number (106005500606005).

Almost surely, 2^{212011001212009} is an apocalyptic number.

It is an amenable number.

212011001212009 is a deficient number, since it is larger than the sum of its proper divisors (1).

212011001212009 is an equidigital number, since it uses as much as digits as its factorization.

212011001212009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 144, while the sum is 22.

The spelling of 212011001212009 in words is "two hundred twelve trillion, eleven billion, one million, two hundred twelve thousand, nine".