21000200111101 has 4 divisors (see below), whose sum is σ = 21006933105600. Its totient is φ = 20993467116604.

The previous prime is 21000200111039. The next prime is 21000200111123. The reversal of 21000200111101 is 10111100200012.

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 a cyclic number.

It is not a de Polignac number, because 21000200111101 - 2¹⁷ = 21000199980029 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 (21000200111131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3366492571 + ... + 3366498808.

It is an arithmetic number, because the mean of its divisors is an integer number (5251733276400).

Almost surely, 2^{21000200111101} is an apocalyptic number.

It is an amenable number.

21000200111101 is a deficient number, since it is larger than the sum of its proper divisors (6732994499).

21000200111101 is an equidigital number, since it uses as much as digits as its factorization.

21000200111101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6732994498.

The product of its (nonzero) digits is 4, while the sum is 10.

Adding to 21000200111101 its reverse (10111100200012), we get a palindrome (31111300311113).

The spelling of 21000200111101 in words is "twenty-one trillion, two hundred million, one hundred eleven thousand, one hundred one".