21100212011103 has 8 divisors (see below), whose sum is σ = 28134391340208. Its totient is φ = 14066420344704.

The previous prime is 21100212011071. The next prime is 21100212011107. The reversal of 21100212011103 is 30111021200112.

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

It is not a de Polignac number, because 21100212011103 - 2⁵ = 21100212011071 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21100212011107) 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 7 ways as a sum of consecutive naturals, for example, 96788650 + ... + 97006407.

It is an arithmetic number, because the mean of its divisors is an integer number (3516798917526).

Almost surely, 2^{21100212011103} is an apocalyptic number.

21100212011103 is a deficient number, since it is larger than the sum of its proper divisors (7034179329105).

21100212011103 is a wasteful number, since it uses less digits than its factorization.

21100212011103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 193831353.

The product of its (nonzero) digits is 24, while the sum is 15.

Adding to 21100212011103 its reverse (30111021200112), we get a palindrome (51211233211215).

The spelling of 21100212011103 in words is "twenty-one trillion, one hundred billion, two hundred twelve million, eleven thousand, one hundred three".