21210200100111 has 32 divisors (see below), whose sum is σ = 30952498855680. Its totient is φ = 12812479257600.

The previous prime is 21210200100079. The next prime is 21210200100211. The reversal of 21210200100111 is 11100100201212.

It is not a de Polignac number, because 21210200100111 - 2⁵ = 21210200100079 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21210200100211) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 41834335 + ... + 42338303.

It is an arithmetic number, because the mean of its divisors is an integer number (967265589240).

Almost surely, 2^{21210200100111} is an apocalyptic number.

21210200100111 is a deficient number, since it is larger than the sum of its proper divisors (9742298755569).

21210200100111 is a wasteful number, since it uses less digits than its factorization.

21210200100111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 508167.

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 21210200100111 its reverse (11100100201212), we get a palindrome (32310300301323).

The spelling of 21210200100111 in words is "twenty-one trillion, two hundred ten billion, two hundred million, one hundred thousand, one hundred eleven".