21210112013 has 8 divisors (see below), whose sum is σ = 21674543232. Its totient is φ = 20746228896.

The previous prime is 21210112003. The next prime is 21210112031. The reversal of 21210112013 is 31021101212.

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 21210112013 - 2⁴ = 21210111997 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 (21210112003) 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 7 ways as a sum of consecutive naturals, for example, 58295 + ... + 214052.

It is an arithmetic number, because the mean of its divisors is an integer number (2709317904).

Almost surely, 2^21210112013 is an apocalyptic number.

It is an amenable number.

21210112013 is a deficient number, since it is larger than the sum of its proper divisors (464431219).

21210112013 is a wasteful number, since it uses less digits than its factorization.

21210112013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 274051.

The product of its (nonzero) digits is 24, while the sum is 14.

Adding to 21210112013 its reverse (31021101212), we get a palindrome (52231213225).

The spelling of 21210112013 in words is "twenty-one billion, two hundred ten million, one hundred twelve thousand, thirteen".