20211100209999 has 48 divisors (see below), whose sum is σ = 32059291249440. Its totient is φ = 12680152750080.

The previous prime is 20211100209983. The next prime is 20211100210009. The reversal of 20211100209999 is 99990200111202.

It is not a de Polignac number, because 20211100209999 - 2⁴ = 20211100209983 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20211100209929) 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 47 ways as a sum of consecutive naturals, for example, 40155207 + ... + 40655415.

It is an arithmetic number, because the mean of its divisors is an integer number (667901901030).

Almost surely, 2^{20211100209999} is an apocalyptic number.

20211100209999 is a deficient number, since it is larger than the sum of its proper divisors (11848191039441).

20211100209999 is an equidigital number, since it uses as much as digits as its factorization.

20211100209999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 510022 (or 510010 counting only the distinct ones).

The product of its (nonzero) digits is 52488, while the sum is 45.

The spelling of 20211100209999 in words is "twenty trillion, two hundred eleven billion, one hundred million, two hundred nine thousand, nine hundred ninety-nine".