21100200213 has 4 divisors (see below), whose sum is σ = 28133600288. Its totient is φ = 14066800140.

The previous prime is 21100200151. The next prime is 21100200217. The reversal of 21100200213 is 31200200112.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 21100200213 - 2¹⁷ = 21100069141 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21100200217) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3516700033 + ... + 3516700038.

It is an arithmetic number, because the mean of its divisors is an integer number (7033400072).

Almost surely, 2^21100200213 is an apocalyptic number.

It is an amenable number.

21100200213 is a deficient number, since it is larger than the sum of its proper divisors (7033400075).

21100200213 is an equidigital number, since it uses as much as digits as its factorization.

21100200213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7033400074.

The product of its (nonzero) digits is 24, while the sum is 12.

Adding to 21100200213 its reverse (31200200112), we get a palindrome (52300400325).

The spelling of 21100200213 in words is "twenty-one billion, one hundred million, two hundred thousand, two hundred thirteen".