21100010200111 has 4 divisors (see below), whose sum is σ = 21163756454824. Its totient is φ = 21036263945400.

The previous prime is 21100010200109. The next prime is 21100010200193. The reversal of 21100010200111 is 11100201000112.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 21100010200111 - 2¹ = 21100010200109 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 (21100010300111) 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, 31873126860 + ... + 31873127521.

It is an arithmetic number, because the mean of its divisors is an integer number (5290939113706).

Almost surely, 2^{21100010200111} is an apocalyptic number.

21100010200111 is a deficient number, since it is larger than the sum of its proper divisors (63746254713).

21100010200111 is an equidigital number, since it uses as much as digits as its factorization.

21100010200111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63746254712.

The product of its (nonzero) digits is 4, while the sum is 10.

Adding to 21100010200111 its reverse (11100201000112), we get a palindrome (32200211200223).

The spelling of 21100010200111 in words is "twenty-one trillion, one hundred billion, ten million, two hundred thousand, one hundred eleven".