21201111112201 has 8 divisors (see below), whose sum is σ = 21885191654144. Its totient is φ = 20517041428560.

The previous prime is 21201111112177. The next prime is 21201111112211. The reversal of 21201111112201 is 10221111110212.

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 21201111112201 - 2⁹ = 21201111111689 is a prime.

It is a super-2 number, since 2×21201111112201² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21201111112211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1350106 + ... + 6650188.

It is an arithmetic number, because the mean of its divisors is an integer number (2735648956768).

Almost surely, 2^{21201111112201} is an apocalyptic number.

It is an amenable number.

21201111112201 is a deficient number, since it is larger than the sum of its proper divisors (684080541943).

21201111112201 is a wasteful number, since it uses less digits than its factorization.

21201111112201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5429151.

The product of its (nonzero) digits is 16, while the sum is 16.

Adding to 21201111112201 its reverse (10221111110212), we get a palindrome (31422222222413).

The spelling of 21201111112201 in words is "twenty-one trillion, two hundred one billion, one hundred eleven million, one hundred twelve thousand, two hundred one".