21221000200999 has 8 divisors (see below), whose sum is σ = 22339594298240. Its totient is φ = 20102576038776.

The previous prime is 21221000200993. The next prime is 21221000201003. The reversal of 21221000200999 is 99900200012212.

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

It is a cyclic number.

It is not a de Polignac number, because 21221000200999 - 2¹³ = 21221000192807 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21221000200993) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 42227379 + ... + 42726964.

It is an arithmetic number, because the mean of its divisors is an integer number (2792449287280).

Almost surely, 2^{21221000200999} is an apocalyptic number.

21221000200999 is a deficient number, since it is larger than the sum of its proper divisors (1118594097241).

21221000200999 is a wasteful number, since it uses less digits than its factorization.

21221000200999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84967509.

The product of its (nonzero) digits is 11664, while the sum is 37.

The spelling of 21221000200999 in words is "twenty-one trillion, two hundred twenty-one billion, two hundred thousand, nine hundred ninety-nine".