221000200120021 has 8 divisors (see below), whose sum is σ = 253483468319360. Its totient is φ = 188744884680528.

The previous prime is 221000200119991. The next prime is 221000200120031. The reversal of 221000200120021 is 120021002000122.

It is a happy number.

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 221000200120021 - 2³⁵ = 220965840381653 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 221000200119983 and 221000200120010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221000200120031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 56988187881 + ... + 56988191758.

It is an arithmetic number, because the mean of its divisors is an integer number (31685433539920).

Almost surely, 2^{221000200120021} is an apocalyptic number.

It is an amenable number.

221000200120021 is a deficient number, since it is larger than the sum of its proper divisors (32483268199339).

221000200120021 is a wasteful number, since it uses less digits than its factorization.

221000200120021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 113976379923.

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 221000200120021 its reverse (120021002000122), we get a palindrome (341021202120143).

The spelling of 221000200120021 in words is "two hundred twenty-one trillion, two hundred million, one hundred twenty thousand, twenty-one".