201221000100221 has 8 divisors (see below), whose sum is σ = 202747386935424. Its totient is φ = 199700016405120.

The previous prime is 201221000100199. The next prime is 201221000100247. The reversal of 201221000100221 is 122001000122102.

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 201221000100221 - 2¹⁴ = 201221000083837 is a prime.

It is a super-3 number, since 3×201221000100221³ (a number of 44 digits) contains 333 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 201221000100196 and 201221000100205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201221000100251) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1350710261 + ... + 1350859226.

It is an arithmetic number, because the mean of its divisors is an integer number (25343423366928).

Almost surely, 2^{201221000100221} is an apocalyptic number.

It is an amenable number.

201221000100221 is a deficient number, since it is larger than the sum of its proper divisors (1526386835203).

201221000100221 is a wasteful number, since it uses less digits than its factorization.

201221000100221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2701570051.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 201221000100221 its reverse (122001000122102), we get a palindrome (323222000222323).

The spelling of 201221000100221 in words is "two hundred one trillion, two hundred twenty-one billion, one hundred thousand, two hundred twenty-one".