21100223211009 has 16 divisors (see below), whose sum is σ = 28140850711680. Its totient is φ = 14063205916800.

The previous prime is 21100223211007. The next prime is 21100223211017. The reversal of 21100223211009 is 90011232200112.

It is not a de Polignac number, because 21100223211009 - 2¹ = 21100223211007 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21100223211009.

It is not an unprimeable number, because it can be changed into a prime (21100223211007) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 491401389 + ... + 491444325.

It is an arithmetic number, because the mean of its divisors is an integer number (1758803169480).

Almost surely, 2^{21100223211009} is an apocalyptic number.

It is an amenable number.

21100223211009 is a deficient number, since it is larger than the sum of its proper divisors (7040627500671).

21100223211009 is a wasteful number, since it uses less digits than its factorization.

21100223211009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81160.

The product of its (nonzero) digits is 432, while the sum is 24.

The spelling of 21100223211009 in words is "twenty-one trillion, one hundred billion, two hundred twenty-three million, two hundred eleven thousand, nine".