21211202200111 has 16 divisors (see below), whose sum is σ = 26445407719680. Its totient is φ = 16528039188480.

The previous prime is 21211202200103. The next prime is 21211202200117. The reversal of 21211202200111 is 11100220211212.

It is a cyclic number.

It is not a de Polignac number, because 21211202200111 - 2³ = 21211202200103 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 (21211202200117) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6377880 + ... + 9115906.

It is an arithmetic number, because the mean of its divisors is an integer number (1652837982480).

Almost surely, 2^{21211202200111} is an apocalyptic number.

21211202200111 is a deficient number, since it is larger than the sum of its proper divisors (5234205519569).

21211202200111 is a wasteful number, since it uses less digits than its factorization.

21211202200111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2838654.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 21211202200111 its reverse (11100220211212), we get a palindrome (32311422411323).

The spelling of 21211202200111 in words is "twenty-one trillion, two hundred eleven billion, two hundred two million, two hundred thousand, one hundred eleven".