21320221298 has 8 divisors (see below), whose sum is σ = 32418418908. Its totient is φ = 10514081664.

The previous prime is 21320221283. The next prime is 21320221327. The reversal of 21320221298 is 89212202312.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 18839484049 + 2480737249 = 137257^2 + 49807^2 .

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

It is a Curzon number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 73014311 + ... + 73014602.

Almost surely, 2^21320221298 is an apocalyptic number.

21320221298 is a deficient number, since it is larger than the sum of its proper divisors (11098197610).

21320221298 is a wasteful number, since it uses less digits than its factorization.

21320221298 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 146028988.

The product of its (nonzero) digits is 6912, while the sum is 32.

The spelling of 21320221298 in words is "twenty-one billion, three hundred twenty million, two hundred twenty-one thousand, two hundred ninety-eight".