21010212101101 has 8 divisors (see below), whose sum is σ = 21096861477120. Its totient is φ = 20923613957712.

The previous prime is 21010212101051. The next prime is 21010212101159. The reversal of 21010212101101 is 10110121201012.

It is a happy number.

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 21010212101101 - 2⁹ = 21010212100589 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 (21010212101171) 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, 11986170 + ... + 13626763.

It is an arithmetic number, because the mean of its divisors is an integer number (2637107684640).

Almost surely, 2^{21010212101101} is an apocalyptic number.

It is an amenable number.

21010212101101 is a deficient number, since it is larger than the sum of its proper divisors (86649376019).

21010212101101 is a wasteful number, since it uses less digits than its factorization.

21010212101101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25616315.

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

Adding to 21010212101101 its reverse (10110121201012), we get a palindrome (31120333302113).

The spelling of 21010212101101 in words is "twenty-one trillion, ten billion, two hundred twelve million, one hundred one thousand, one hundred one".