221000101 has 8 divisors (see below), whose sum is σ = 252714560. Its totient is φ = 189321408.

The previous prime is 221000071. The next prime is 221000107. The reversal of 221000101 is 101000122.

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 221000101 - 2⁵ = 221000069 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (7).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221000107) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5965 + ... + 21853.

It is an arithmetic number, because the mean of its divisors is an integer number (31589320).

Almost surely, 2^221000101 is an apocalyptic number.

It is an amenable number.

221000101 is a deficient number, since it is larger than the sum of its proper divisors (31714459).

221000101 is a wasteful number, since it uses less digits than its factorization.

221000101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17883.

The product of its (nonzero) digits is 4, while the sum is 7.

The square root of 221000101 is about 14866.0721443157. The cubic root of 221000101 is about 604.5944517038.

Adding to 221000101 its reverse (101000122), we get a palindrome (322000223).

The spelling of 221000101 in words is "two hundred twenty-one million, one hundred one", and thus it is an aban number.