21100344213 has 8 divisors (see below), whose sum is σ = 30297930208. Its totient is φ = 12984827184.

The previous prime is 21100344193. The next prime is 21100344247. The reversal of 21100344213 is 31244300112.

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

It is not a de Polignac number, because 21100344213 - 2⁶ = 21100344149 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21100344213.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21100344413) 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, 270517195 + ... + 270517272.

It is an arithmetic number, because the mean of its divisors is an integer number (3787241276).

Almost surely, 2^21100344213 is an apocalyptic number.

It is an amenable number.

21100344213 is a deficient number, since it is larger than the sum of its proper divisors (9197585995).

21100344213 is a wasteful number, since it uses less digits than its factorization.

21100344213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 541034483.

The product of its (nonzero) digits is 576, while the sum is 21.

Adding to 21100344213 its reverse (31244300112), we get a palindrome (52344644325).

The spelling of 21100344213 in words is "twenty-one billion, one hundred million, three hundred forty-four thousand, two hundred thirteen".