221532101 has 8 divisors (see below), whose sum is σ = 253291584. Its totient is φ = 189800640.

The previous prime is 221532097. The next prime is 221532133. The reversal of 221532101 is 101235122.

It is a happy number.

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 221532101 - 2² = 221532097 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 221532101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221532161) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14246 + ... + 25416.

It is an arithmetic number, because the mean of its divisors is an integer number (31661448).

Almost surely, 2^221532101 is an apocalyptic number.

It is an amenable number.

221532101 is a deficient number, since it is larger than the sum of its proper divisors (31759483).

221532101 is a wasteful number, since it uses less digits than its factorization.

221532101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14011.

The product of its (nonzero) digits is 120, while the sum is 17.

The square root of 221532101 is about 14883.9544812526. The cubic root of 221532101 is about 605.0791973366.

Adding to 221532101 its reverse (101235122), we get a palindrome (322767223).

The spelling of 221532101 in words is "two hundred twenty-one million, five hundred thirty-two thousand, one hundred one".