21002223298 has 12 divisors (see below), whose sum is σ = 36646736742. Its totient is φ = 9000952800.

The previous prime is 21002223259. The next prime is 21002223301. The reversal of 21002223298 is 89232220012.

It can be written as a sum of positive squares in only one way, i.e., 11577114409 + 9425108889 = 107597^2 + 97083^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 107154103 + ... + 107154298.

Almost surely, 2^21002223298 is an apocalyptic number.

21002223298 is a deficient number, since it is larger than the sum of its proper divisors (15644513444).

21002223298 is a wasteful number, since it uses less digits than its factorization.

21002223298 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 214308417 (or 214308410 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 31.

The spelling of 21002223298 in words is "twenty-one billion, two million, two hundred twenty-three thousand, two hundred ninety-eight".