101100221 has 4 divisors (see below), whose sum is σ = 101127612. Its totient is φ = 101072832.

The previous prime is 101100211. The next prime is 101100227. The reversal of 101100221 is 122001101.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 66748900 + 34351321 = 8170^2 + 5861^2 .

It is a cyclic number.

It is not a de Polignac number, because 101100221 - 2¹⁰ = 101099197 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 101100199 and 101100208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (101100227) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7100 + ... + 15893.

It is an arithmetic number, because the mean of its divisors is an integer number (25281903).

Almost surely, 2^101100221 is an apocalyptic number.

It is an amenable number.

101100221 is a deficient number, since it is larger than the sum of its proper divisors (27391).

101100221 is an equidigital number, since it uses as much as digits as its factorization.

101100221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27390.

The product of its (nonzero) digits is 4, while the sum is 8.

The square root of 101100221 is about 10054.8605659154. The cubic root of 101100221 is about 465.8549362121.

Adding to 101100221 its reverse (122001101), we get a palindrome (223101322).

The spelling of 101100221 in words is "one hundred one million, one hundred thousand, two hundred twenty-one".