21216200201101 has 4 divisors (see below), whose sum is σ = 21216317107392. Its totient is φ = 21216083294812.

The previous prime is 21216200201089. The next prime is 21216200201137. The reversal of 21216200201101 is 10110200261212.

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 21216200201101 - 2¹⁷ = 21216200070029 is a prime.

It is a super-2 number, since 2×21216200201101² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21216200201501) 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, 58180501 + ... + 58544026.

It is an arithmetic number, because the mean of its divisors is an integer number (5304079276848).

Almost surely, 2^{21216200201101} is an apocalyptic number.

It is an amenable number.

21216200201101 is a deficient number, since it is larger than the sum of its proper divisors (116906291).

21216200201101 is a wasteful number, since it uses less digits than its factorization.

21216200201101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 116906290.

The product of its (nonzero) digits is 96, while the sum is 19.

Adding to 21216200201101 its reverse (10110200261212), we get a palindrome (31326400462313).

The spelling of 21216200201101 in words is "twenty-one trillion, two hundred sixteen billion, two hundred million, two hundred one thousand, one hundred one".