21100220010009 has 24 divisors (see below), whose sum is σ = 34842623334272. Its totient is φ = 12053629077120.

The previous prime is 21100220010007. The next prime is 21100220010011. The reversal of 21100220010009 is 90001002200112.

It is an interprime number because it is at equal distance from previous prime (21100220010007) and next prime (21100220010011).

It is not a de Polignac number, because 21100220010009 - 2¹ = 21100220010007 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21100220009973 and 21100220010000.

It is not an unprimeable number, because it can be changed into a prime (21100220010007) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 50338237 + ... + 50755674.

Almost surely, 2^{21100220010009} is an apocalyptic number.

It is an amenable number.

21100220010009 is a deficient number, since it is larger than the sum of its proper divisors (13742403324263).

21100220010009 is a wasteful number, since it uses less digits than its factorization.

21100220010009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101097237 (or 101097234 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 18.

The spelling of 21100220010009 in words is "twenty-one trillion, one hundred billion, two hundred twenty million, ten thousand, nine".