10212021201209 has 16 divisors (see below), whose sum is σ = 10333035284880. Its totient is φ = 10091537280000.

The previous prime is 10212021201199. The next prime is 10212021201223. The reversal of 10212021201209 is 90210212021201.

It can be written as a sum of positive squares in 8 ways, for example, as 2240275530025 + 7971745671184 = 1496755^2 + 2823428^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-10212021201209 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (10212021201229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 66808349 + ... + 66961029.

It is an arithmetic number, because the mean of its divisors is an integer number (645814705305).

Almost surely, 2^{10212021201209} is an apocalyptic number.

It is an amenable number.

10212021201209 is a deficient number, since it is larger than the sum of its proper divisors (121014083671).

10212021201209 is a wasteful number, since it uses less digits than its factorization.

10212021201209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 154412.

The product of its (nonzero) digits is 288, while the sum is 23.

The spelling of 10212021201209 in words is "ten trillion, two hundred twelve billion, twenty-one million, two hundred one thousand, two hundred nine".