221266106 has 4 divisors (see below), whose sum is σ = 331899162. Its totient is φ = 110633052.

The previous prime is 221266103. The next prime is 221266117. The reversal of 221266106 is 601662122.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 199967881 + 21298225 = 14141^2 + 4615^2 .

It is not an unprimeable number, because it can be changed into a prime (221266103) 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 as a sum of consecutive naturals, namely, 55316525 + ... + 55316528.

Almost surely, 2^221266106 is an apocalyptic number.

221266106 is a deficient number, since it is larger than the sum of its proper divisors (110633056).

221266106 is a wasteful number, since it uses less digits than its factorization.

221266106 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110633055.

The product of its (nonzero) digits is 1728, while the sum is 26.

The square root of 221266106 is about 14875.0161680584. The cubic root of 221266106 is about 604.8369262008.

The spelling of 221266106 in words is "two hundred twenty-one million, two hundred sixty-six thousand, one hundred six".