21300213217 has 8 divisors (see below), whose sum is σ = 21675012480. Its totient is φ = 20925873360.

The previous prime is 21300213197. The next prime is 21300213227. The reversal of 21300213217 is 71231200312.

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 not a de Polignac number, because 21300213217 - 2³¹ = 19152729569 is a prime.

It is a super-2 number, since 2×21300213217² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21300213227) 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, 20634 + ... + 207427.

It is an arithmetic number, because the mean of its divisors is an integer number (2709376560).

Almost surely, 2^21300213217 is an apocalyptic number.

It is an amenable number.

21300213217 is a deficient number, since it is larger than the sum of its proper divisors (374799263).

21300213217 is a wasteful number, since it uses less digits than its factorization.

21300213217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 229703.

The product of its (nonzero) digits is 504, while the sum is 22.

Adding to 21300213217 its reverse (71231200312), we get a palindrome (92531413529).

The spelling of 21300213217 in words is "twenty-one billion, three hundred million, two hundred thirteen thousand, two hundred seventeen".