21212013043101 has 8 divisors (see below), whose sum is σ = 28349863831264. Its totient is φ = 14107752141840.

The previous prime is 21212013043063. The next prime is 21212013043217. The reversal of 21212013043101 is 10134031021212.

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

It is not a de Polignac number, because 21212013043101 - 2¹⁵ = 21212013010333 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21212013093101) 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, 8397470251 + ... + 8397472776.

It is an arithmetic number, because the mean of its divisors is an integer number (3543732978908).

Almost surely, 2^{21212013043101} is an apocalyptic number.

It is an amenable number.

21212013043101 is a deficient number, since it is larger than the sum of its proper divisors (7137850788163).

21212013043101 is a wasteful number, since it uses less digits than its factorization.

21212013043101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16794943451.

The product of its (nonzero) digits is 288, while the sum is 21.

Adding to 21212013043101 its reverse (10134031021212), we get a palindrome (31346044064313).

The spelling of 21212013043101 in words is "twenty-one trillion, two hundred twelve billion, thirteen million, forty-three thousand, one hundred one".