21010110112101 has 8 divisors (see below), whose sum is σ = 30560160163104. Its totient is φ = 12733400067920.

The previous prime is 21010110112067. The next prime is 21010110112111. The reversal of 21010110112101 is 10121101101012.

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 21010110112101 - 2⁶ = 21010110112037 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21010110112111) 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, 318335001666 + ... + 318335001731.

It is an arithmetic number, because the mean of its divisors is an integer number (3820020020388).

Almost surely, 2^{21010110112101} is an apocalyptic number.

It is an amenable number.

21010110112101 is a deficient number, since it is larger than the sum of its proper divisors (9550050051003).

21010110112101 is a wasteful number, since it uses less digits than its factorization.

21010110112101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 636670003411.

The product of its (nonzero) digits is 4, while the sum is 12.

Adding to 21010110112101 its reverse (10121101101012), we get a palindrome (31131211213113).

The spelling of 21010110112101 in words is "twenty-one trillion, ten billion, one hundred ten million, one hundred twelve thousand, one hundred one".