221320101 has 8 divisors (see below), whose sum is σ = 295532064. Its totient is φ = 147327440.

The previous prime is 221320079. The next prime is 221320153. The reversal of 221320101 is 101023122.

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 221320101 - 2¹⁷ = 221189029 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221320201) 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, 52455 + ... + 56516.

It is an arithmetic number, because the mean of its divisors is an integer number (36941508).

Almost surely, 2^221320101 is an apocalyptic number.

It is an amenable number.

221320101 is a deficient number, since it is larger than the sum of its proper divisors (74211963).

221320101 is a wasteful number, since it uses less digits than its factorization.

221320101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109651.

The product of its (nonzero) digits is 24, while the sum is 12.

The square root of 221320101 is about 14876.8310133576. The cubic root of 221320101 is about 604.8861211337.

Adding to 221320101 its reverse (101023122), we get a palindrome (322343223).

The spelling of 221320101 in words is "two hundred twenty-one million, three hundred twenty thousand, one hundred one".