21210110100013 has 8 divisors (see below), whose sum is σ = 21941619194880. Its totient is φ = 20478609404400.

The previous prime is 21210110100001. The next prime is 21210110100043. The reversal of 21210110100013 is 31000101101212.

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 a de Polignac number, because none of the positive numbers 2^k-21210110100013 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21210110099966 and 21210110100002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21210110100043) 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, 3270588 + ... + 7288138.

It is an arithmetic number, because the mean of its divisors is an integer number (2742702399360).

Almost surely, 2^{21210110100013} is an apocalyptic number.

It is an amenable number.

21210110100013 is a deficient number, since it is larger than the sum of its proper divisors (731509094867).

21210110100013 is a wasteful number, since it uses less digits than its factorization.

21210110100013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4199627.

The product of its (nonzero) digits is 12, while the sum is 13.

Adding to 21210110100013 its reverse (31000101101212), we get a palindrome (52210211201225).

The spelling of 21210110100013 in words is "twenty-one trillion, two hundred ten billion, one hundred ten million, one hundred thousand, thirteen".