212021150009 has 2 divisors, whose sum is σ = 212021150010. Its totient is φ = 212021150008.

The previous prime is 212021149981. The next prime is 212021150023. The reversal of 212021150009 is 900051120212.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 195781470784 + 16239679225 = 442472^2 + 127435^2 .

It is a cyclic number.

It is not a de Polignac number, because 212021150009 - 2²⁸ = 211752714553 is a prime.

It is a super-2 number, since 2×212021150009² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (212021150039) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106010575004 + 106010575005.

It is an arithmetic number, because the mean of its divisors is an integer number (106010575005).

Almost surely, 2^212021150009 is an apocalyptic number.

It is an amenable number.

212021150009 is a deficient number, since it is larger than the sum of its proper divisors (1).

212021150009 is an equidigital number, since it uses as much as digits as its factorization.

212021150009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 360, while the sum is 23.

The spelling of 212021150009 in words is "two hundred twelve billion, twenty-one million, one hundred fifty thousand, nine".