21217760299 has 8 divisors (see below), whose sum is σ = 22579907328. Its totient is φ = 19868284800.

The previous prime is 21217760279. The next prime is 21217760327. The reversal of 21217760299 is 99206771212.

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 21217760299 - 2¹⁷ = 21217629227 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21217760219) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3164427 + ... + 3171124.

It is an arithmetic number, because the mean of its divisors is an integer number (2822488416).

Almost surely, 2^21217760299 is an apocalyptic number.

21217760299 is a deficient number, since it is larger than the sum of its proper divisors (1362147029).

21217760299 is a wasteful number, since it uses less digits than its factorization.

21217760299 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6335765.

The product of its (nonzero) digits is 190512, while the sum is 46.

The spelling of 21217760299 in words is "twenty-one billion, two hundred seventeen million, seven hundred sixty thousand, two hundred ninety-nine".