21201110109982 has 8 divisors (see below), whose sum is σ = 34692725634552. Its totient is φ = 9636868231800.

The previous prime is 21201110109943. The next prime is 21201110110007. The reversal of 21201110109982 is 28990101110212.

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

It is a congruent number.

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 3 ways as a sum of consecutive naturals, for example, 481843411569 + ... + 481843411612.

It is an arithmetic number, because the mean of its divisors is an integer number (4336590704319).

Almost surely, 2^{21201110109982} is an apocalyptic number.

21201110109982 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

21201110109982 is a deficient number, since it is larger than the sum of its proper divisors (13491615524570).

21201110109982 is a wasteful number, since it uses less digits than its factorization.

21201110109982 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 963686823194.

The product of its (nonzero) digits is 5184, while the sum is 37.

The spelling of 21201110109982 in words is "twenty-one trillion, two hundred one billion, one hundred ten million, one hundred nine thousand, nine hundred eighty-two".