21110112002101 has 8 divisors (see below), whose sum is σ = 21141337493144. Its totient is φ = 21078893122560.

The previous prime is 21110112002087. The next prime is 21110112002123. The reversal of 21110112002101 is 10120021101112.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 4599420679876 + 16510691322225 = 2144626^2 + 4063335^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 21110112002101 - 2⁷ = 21110112001973 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 (21110112002201) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 4756081 + ... + 8052361.

It is an arithmetic number, because the mean of its divisors is an integer number (2642667186643).

Almost surely, 2^{21110112002101} is an apocalyptic number.

It is an amenable number.

21110112002101 is a deficient number, since it is larger than the sum of its proper divisors (31225491043).

21110112002101 is an equidigital number, since it uses as much as digits as its factorization.

21110112002101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3305751.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 21110112002101 its reverse (10120021101112), we get a palindrome (31230133103213).

The spelling of 21110112002101 in words is "twenty-one trillion, one hundred ten billion, one hundred twelve million, two thousand, one hundred one".