2221221201 has 32 divisors (see below), whose sum is σ = 3197399040. Its totient is φ = 1367077824.

The previous prime is 2221221193. The next prime is 2221221209. The reversal of 2221221201 is 1021221222.

It is an interprime number because it is at equal distance from previous prime (2221221193) and next prime (2221221209).

It is not a de Polignac number, because 2221221201 - 2³ = 2221221193 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2221221209) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1487011 + ... + 1488503.

It is an arithmetic number, because the mean of its divisors is an integer number (99918720).

Almost surely, 2^2221221201 is an apocalyptic number.

It is an amenable number.

2221221201 is a deficient number, since it is larger than the sum of its proper divisors (976177839).

2221221201 is a wasteful number, since it uses less digits than its factorization.

2221221201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2165.

The product of its (nonzero) digits is 64, while the sum is 15.

The square root of 2221221201 is about 47129.8334497375. The cubic root of 2221221201 is about 1304.7599076812.

Adding to 2221221201 its reverse (1021221222), we get a palindrome (3242442423).

The spelling of 2221221201 in words is "two billion, two hundred twenty-one million, two hundred twenty-one thousand, two hundred one".