21112020998 has 8 divisors (see below), whose sum is σ = 31668722280. Its totient is φ = 10555780240.

The previous prime is 21112020971. The next prime is 21112021033. The reversal of 21112020998 is 89902021112.

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

It is a Curzon number.

It is a congruent 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, 42818 + ... + 209898.

It is an arithmetic number, because the mean of its divisors is an integer number (3958590285).

Almost surely, 2^21112020998 is an apocalyptic number.

21112020998 is a deficient number, since it is larger than the sum of its proper divisors (10556701282).

21112020998 is a wasteful number, since it uses less digits than its factorization.

21112020998 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 230262.

The product of its (nonzero) digits is 5184, while the sum is 35.

The spelling of 21112020998 in words is "twenty-one billion, one hundred twelve million, twenty thousand, nine hundred ninety-eight".