21100022220010 has 16 divisors (see below), whose sum is σ = 38257266567816. Its totient is φ = 8378402983168.

The previous prime is 21100022219993. The next prime is 21100022220071. The reversal of 21100022220010 is 1002222000112.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 13472797821961 + 7627224398049 = 3670531^2 + 2761743^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7700736667 + ... + 7700739406.

Almost surely, 2^{21100022220010} is an apocalyptic number.

21100022220010 is a deficient number, since it is larger than the sum of its proper divisors (17157244347806).

21100022220010 is a wasteful number, since it uses less digits than its factorization.

21100022220010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15401476217.

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 21100022220010 its reverse (1002222000112), we get a palindrome (22102244220122).

The spelling of 21100022220010 in words is "twenty-one trillion, one hundred billion, twenty-two million, two hundred twenty thousand, ten".