21102320213 has 8 divisors (see below), whose sum is σ = 22729676256. Its totient is φ = 19475550000.

The previous prime is 21102320191. The next prime is 21102320243. The reversal of 21102320213 is 31202320112.

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 21102320213 - 2¹⁴ = 21102303829 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21102320191 and 21102320200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21102320243) 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, 70163 + ... + 217088.

It is an arithmetic number, because the mean of its divisors is an integer number (2841209532).

Almost surely, 2^21102320213 is an apocalyptic number.

It is an amenable number.

21102320213 is a deficient number, since it is larger than the sum of its proper divisors (1627356043).

21102320213 is a wasteful number, since it uses less digits than its factorization.

21102320213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 292915.

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 21102320213 its reverse (31202320112), we get a palindrome (52304640325).

The spelling of 21102320213 in words is "twenty-one billion, one hundred two million, three hundred twenty thousand, two hundred thirteen".