21202110009998 has 8 divisors (see below), whose sum is σ = 33477015805320. Its totient is φ = 10043104741560.

The previous prime is 21202110009991. The next prime is 21202110010009. The reversal of 21202110009998 is 89990001120212.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21202110009991) 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 3 ways as a sum of consecutive naturals, for example, 278975131673 + ... + 278975131748.

It is an arithmetic number, because the mean of its divisors is an integer number (4184626975665).

Almost surely, 2^{21202110009998} is an apocalyptic number.

21202110009998 is a deficient number, since it is larger than the sum of its proper divisors (12274905795322).

21202110009998 is a wasteful number, since it uses less digits than its factorization.

21202110009998 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 557950263442.

The product of its (nonzero) digits is 46656, while the sum is 44.

The spelling of 21202110009998 in words is "twenty-one trillion, two hundred two billion, one hundred ten million, nine thousand, nine hundred ninety-eight".