212222210122009 has 2 divisors, whose sum is σ = 212222210122010. Its totient is φ = 212222210122008.

The previous prime is 212222210121953. The next prime is 212222210122121. The reversal of 212222210122009 is 900221012222212.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 145713748728025 + 66508461393984 = 12071195^2 + 8155272^2 .

It is a cyclic number.

It is not a de Polignac number, because 212222210122009 - 2⁹ = 212222210121497 is a prime.

It is not a weakly prime, because it can be changed into another prime (212222210102009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106111105061004 + 106111105061005.

It is an arithmetic number, because the mean of its divisors is an integer number (106111105061005).

Almost surely, 2^{212222210122009} is an apocalyptic number.

It is an amenable number.

212222210122009 is a deficient number, since it is larger than the sum of its proper divisors (1).

212222210122009 is an equidigital number, since it uses as much as digits as its factorization.

212222210122009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2304, while the sum is 28.

The spelling of 212222210122009 in words is "two hundred twelve trillion, two hundred twenty-two billion, two hundred ten million, one hundred twenty-two thousand, nine".