2201221121002 has 16 divisors (see below), whose sum is σ = 3306073717800. Its totient is φ = 1099196839872.

The previous prime is 2201221120999. The next prime is 2201221121003. The reversal of 2201221121002 is 2001211221022.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 684311127361 + 1516909993641 = 827231^2 + 1231629^2 .

It is not an unprimeable number, because it can be changed into a prime (2201221121003) 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 7 ways as a sum of consecutive naturals, for example, 16195624 + ... + 16330972.

Almost surely, 2^{2201221121002} is an apocalyptic number.

2201221121002 is a deficient number, since it is larger than the sum of its proper divisors (1104852596798).

2201221121002 is a wasteful number, since it uses less digits than its factorization.

2201221121002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 145737.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 2201221121002 its reverse (2001211221022), we get a palindrome (4202432342024).

The spelling of 2201221121002 in words is "two trillion, two hundred one billion, two hundred twenty-one million, one hundred twenty-one thousand, two".