2201221028 has 12 divisors (see below), whose sum is σ = 3853157532. Its totient is φ = 1100318880.

The previous prime is 2201221027. The next prime is 2201221091. The reversal of 2201221028 is 8201221022.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 1264371364 + 936849664 = 35558^2 + 30608^2 .

It is not an unprimeable number, because it can be changed into a prime (2201221027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 55463 + ... + 86478.

It is an arithmetic number, because the mean of its divisors is an integer number (321096461).

Almost surely, 2^2201221028 is an apocalyptic number.

It is an amenable number.

2201221028 is a deficient number, since it is larger than the sum of its proper divisors (1651936504).

2201221028 is a wasteful number, since it uses less digits than its factorization.

2201221028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 145822 (or 145820 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 20.

The square root of 2201221028 is about 46917.1719949103. The cubic root of 2201221028 is about 1300.8320172857.

The spelling of 2201221028 in words is "two billion, two hundred one million, two hundred twenty-one thousand, twenty-eight".