20021101102209 has 16 divisors (see below), whose sum is σ = 27584598439424. Its totient is φ = 12916839363120.

The previous prime is 20021101102207. The next prime is 20021101102217. The reversal of 20021101102209 is 90220110112002.

It is not a de Polignac number, because 20021101102209 - 2¹ = 20021101102207 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20021101102207) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 111919294 + ... + 112098039.

It is an arithmetic number, because the mean of its divisors is an integer number (1724037402464).

Almost surely, 2^{20021101102209} is an apocalyptic number.

It is an amenable number.

20021101102209 is a deficient number, since it is larger than the sum of its proper divisors (7563497337215).

20021101102209 is an frugal number, since it uses more digits than its factorization.

20021101102209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 224017429 (or 224017367 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 21.

The spelling of 20021101102209 in words is "twenty trillion, twenty-one billion, one hundred one million, one hundred two thousand, two hundred nine".