21102002100111 has 32 divisors (see below), whose sum is σ = 30006998138880. Its totient is φ = 13144510439424.

The previous prime is 21102002100097. The next prime is 21102002100143. The reversal of 21102002100111 is 11100120020112.

It is not a de Polignac number, because 21102002100111 - 2²¹ = 21102000002959 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21102002100161) 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, 152365551 + ... + 152503983.

It is an arithmetic number, because the mean of its divisors is an integer number (937718691840).

Almost surely, 2^{21102002100111} is an apocalyptic number.

21102002100111 is a deficient number, since it is larger than the sum of its proper divisors (8904996038769).

21102002100111 is a wasteful number, since it uses less digits than its factorization.

21102002100111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 160095.

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

Adding to 21102002100111 its reverse (11100120020112), we get a palindrome (32202122120223).

The spelling of 21102002100111 in words is "twenty-one trillion, one hundred two billion, two million, one hundred thousand, one hundred eleven".