221401101 has 8 divisors (see below), whose sum is σ = 304724224. Its totient is φ = 142839360.

The previous prime is 221401079. The next prime is 221401111. The reversal of 221401101 is 101104122.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 221401101 - 2¹¹ = 221399053 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221401111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1190236 + ... + 1190421.

It is an arithmetic number, because the mean of its divisors is an integer number (38090528).

Almost surely, 2^221401101 is an apocalyptic number.

It is an amenable number.

221401101 is a deficient number, since it is larger than the sum of its proper divisors (83323123).

221401101 is a wasteful number, since it uses less digits than its factorization.

221401101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2380691.

The product of its (nonzero) digits is 16, while the sum is 12.

The square root of 221401101 is about 14879.5531182895. The cubic root of 221401101 is about 604.9599053638.

Adding to 221401101 its reverse (101104122), we get a palindrome (322505223).

The spelling of 221401101 in words is "two hundred twenty-one million, four hundred one thousand, one hundred one".