21110212101 has 64 divisors (see below), whose sum is σ = 32309839872. Its totient is φ = 12146400000.

The previous prime is 21110212099. The next prime is 21110212127. The reversal of 21110212101 is 10121201112.

It is not a de Polignac number, because 21110212101 - 2¹ = 21110212099 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21110212171) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 8754586 + ... + 8756996.

It is an arithmetic number, because the mean of its divisors is an integer number (504841248).

Almost surely, 2^21110212101 is an apocalyptic number.

It is an amenable number.

21110212101 is a deficient number, since it is larger than the sum of its proper divisors (11199627771).

21110212101 is a wasteful number, since it uses less digits than its factorization.

21110212101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2634.

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 21110212101 its reverse (10121201112), we get a palindrome (31231413213).

The spelling of 21110212101 in words is "twenty-one billion, one hundred ten million, two hundred twelve thousand, one hundred one".