221020212010209 has 8 divisors (see below), whose sum is σ = 312028534602720. Its totient is φ = 138679348712256.

The previous prime is 221020212010159. The next prime is 221020212010249. The reversal of 221020212010209 is 902010212020122.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 221020212010209 - 2⁹ = 221020212009697 is a prime.

It is not an unprimeable number, because it can be changed into a prime (221020212010249) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2166864823579 + ... + 2166864823680.

It is an arithmetic number, because the mean of its divisors is an integer number (39003566825340).

Almost surely, 2^{221020212010209} is an apocalyptic number.

It is an amenable number.

221020212010209 is a deficient number, since it is larger than the sum of its proper divisors (91008322592511).

221020212010209 is a wasteful number, since it uses less digits than its factorization.

221020212010209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4333729647279.

The product of its (nonzero) digits is 576, while the sum is 24.

The spelling of 221020212010209 in words is "two hundred twenty-one trillion, twenty billion, two hundred twelve million, ten thousand, two hundred nine".