21201101001101 has 8 divisors (see below), whose sum is σ = 24233739694080. Its totient is φ = 18169439802768.

The previous prime is 21201101000971. The next prime is 21201101001133. The reversal of 21201101001101 is 10110010110212.

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

It is a cyclic number.

It is not a de Polignac number, because 21201101001101 - 2¹⁰ = 21201101000077 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21201101031101) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 244327181 + ... + 244413938.

It is an arithmetic number, because the mean of its divisors is an integer number (3029217461760).

Almost surely, 2^{21201101001101} is an apocalyptic number.

It is an amenable number.

21201101001101 is a deficient number, since it is larger than the sum of its proper divisors (3032638692979).

21201101001101 is an equidigital number, since it uses as much as digits as its factorization.

21201101001101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 488747323.

The product of its (nonzero) digits is 4, while the sum is 11.

Adding to 21201101001101 its reverse (10110010110212), we get a palindrome (31311111111313).

The spelling of 21201101001101 in words is "twenty-one trillion, two hundred one billion, one hundred one million, one thousand, one hundred one".