212021002220009 has 2 divisors, whose sum is σ = 212021002220010. Its totient is φ = 212021002220008.

The previous prime is 212021002219907. The next prime is 212021002220033. The reversal of 212021002220009 is 900022200120212.

212021002220009 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 176824250910784 + 35196751309225 = 13297528^2 + 5932685^2 .

It is a cyclic number.

It is not a de Polignac number, because 212021002220009 - 2³⁶ = 211952282743273 is a prime.

It is a super-2 number, since 2×212021002220009² (a number of 29 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (212021002210009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106010501110004 + 106010501110005.

It is an arithmetic number, because the mean of its divisors is an integer number (106010501110005).

Almost surely, 2^{212021002220009} is an apocalyptic number.

It is an amenable number.

212021002220009 is a deficient number, since it is larger than the sum of its proper divisors (1).

212021002220009 is an equidigital number, since it uses as much as digits as its factorization.

212021002220009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 576, while the sum is 23.

The spelling of 212021002220009 in words is "two hundred twelve trillion, twenty-one billion, two million, two hundred twenty thousand, nine".