21101100020201 has 8 divisors (see below), whose sum is σ = 21215861731104. Its totient is φ = 20986394284800.

The previous prime is 21101100020149. The next prime is 21101100020227. The reversal of 21101100020201 is 10202000110112.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21101100020201 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21101100020281) 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 7 ways as a sum of consecutive naturals, for example, 13237775 + ... + 14745876.

It is an arithmetic number, because the mean of its divisors is an integer number (2651982716388).

Almost surely, 2^{21101100020201} is an apocalyptic number.

It is an amenable number.

21101100020201 is a deficient number, since it is larger than the sum of its proper divisors (114761710903).

21101100020201 is a wasteful number, since it uses less digits than its factorization.

21101100020201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27987751.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 21101100020201 its reverse (10202000110112), we get a palindrome (31303100130313).

The spelling of 21101100020201 in words is "twenty-one trillion, one hundred one billion, one hundred million, twenty thousand, two hundred one".