221031106 has 8 divisors (see below), whose sum is σ = 331845264. Its totient is φ = 110416020.

The previous prime is 221031101. The next prime is 221031119. The reversal of 221031106 is 601130122.

221031106 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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

It is a self number, because there is not a number n which added to its sum of digits gives 221031106.

It is not an unprimeable number, because it can be changed into a prime (221031101) 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 3 ways as a sum of consecutive naturals, for example, 46960 + ... + 51451.

It is an arithmetic number, because the mean of its divisors is an integer number (41480658).

Almost surely, 2^221031106 is an apocalyptic number.

221031106 is a deficient number, since it is larger than the sum of its proper divisors (110814158).

221031106 is a wasteful number, since it uses less digits than its factorization.

221031106 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99536.

The product of its (nonzero) digits is 72, while the sum is 16.

The square root of 221031106 is about 14867.1149185039. The cubic root of 221031106 is about 604.6227240505.

Adding to 221031106 its reverse (601130122), we get a palindrome (822161228).

The spelling of 221031106 in words is "two hundred twenty-one million, thirty-one thousand, one hundred six".