21110001111100 has 54 divisors (see below), whose sum is σ = 50351714249312. Its totient is φ = 7676364036000.

The previous prime is 21110001111047. The next prime is 21110001111193. The reversal of 21110001111100 is 111110001112.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 872301996 + ... + 872326195.

Almost surely, 2^{21110001111100} is an apocalyptic number.

21110001111100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21110001111100 is an abundant number, since it is smaller than the sum of its proper divisors (29241713138212).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21110001111100 is a wasteful number, since it uses less digits than its factorization.

21110001111100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1744628227 (or 1744628209 counting only the distinct ones).

The product of its (nonzero) digits is 2, while the sum is 10.

Adding to 21110001111100 its reverse (111110001112), we get a palindrome (21221111112212).

The spelling of 21110001111100 in words is "twenty-one trillion, one hundred ten billion, one million, one hundred eleven thousand, one hundred".