22001220002 has 16 divisors (see below), whose sum is σ = 33819555672. Its totient is φ = 10728238080.

The previous prime is 22001220001. The next prime is 22001220037. The reversal of 22001220002 is 20002210022.

It can be written as a sum of positive squares in 4 ways, for example, as 19381929961 + 2619290041 = 139219^2 + 51179^2 .

It is not an unprimeable number, because it can be changed into a prime (22001220001) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 173018 + ... + 271914.

Almost surely, 2^22001220002 is an apocalyptic number.

22001220002 is a deficient number, since it is larger than the sum of its proper divisors (11818335670).

22001220002 is a wasteful number, since it uses less digits than its factorization.

22001220002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101653.

The product of its (nonzero) digits is 32, while the sum is 11.

Adding to 22001220002 its reverse (20002210022), we get a palindrome (42003430024).

The spelling of 22001220002 in words is "twenty-two billion, one million, two hundred twenty thousand, two".