21111000100001 has 8 divisors (see below), whose sum is σ = 24178967103744. Its totient is φ = 18056060557920.

The previous prime is 21111000099907. The next prime is 21111000100013. The reversal of 21111000100001 is 10000100011112.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 21111000100001 - 2¹⁴ = 21111000083617 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21111000100051) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3256861940 + ... + 3256868421.

It is an arithmetic number, because the mean of its divisors is an integer number (3022370887968).

Almost surely, 2^{21111000100001} is an apocalyptic number.

It is an amenable number.

21111000100001 is a deficient number, since it is larger than the sum of its proper divisors (3067967003743).

21111000100001 is an equidigital number, since it uses as much as digits as its factorization.

21111000100001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6513730831.

The product of its (nonzero) digits is 2, while the sum is 8.

Adding to 21111000100001 its reverse (10000100011112), we get a palindrome (31111100111113).

The spelling of 21111000100001 in words is "twenty-one trillion, one hundred eleven billion, one hundred thousand, one".