221201101 has 4 divisors (see below), whose sum is σ = 241310304. Its totient is φ = 201091900.

The previous prime is 221201083. The next prime is 221201117. The reversal of 221201101 is 101102122.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 221201101 - 2⁹ = 221200589 is a prime.

It is a super-2 number, since 2×221201101² = 97859854167224402, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221201131) 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, 10054585 + ... + 10054606.

It is an arithmetic number, because the mean of its divisors is an integer number (60327576).

Almost surely, 2^221201101 is an apocalyptic number.

It is an amenable number.

221201101 is a deficient number, since it is larger than the sum of its proper divisors (20109203).

221201101 is a wasteful number, since it uses less digits than its factorization.

221201101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20109202.

The product of its (nonzero) digits is 8, while the sum is 10.

The square root of 221201101 is about 14872.8309679092. The cubic root of 221201101 is about 604.7776894202. Note that the first 3 decimals are identical.

Adding to 221201101 its reverse (101102122), we get a palindrome (322303223).

The spelling of 221201101 in words is "two hundred twenty-one million, two hundred one thousand, one hundred one".