21201100220012 has 12 divisors (see below), whose sum is σ = 37159626673176. Its totient is φ = 10584064027680.

The previous prime is 21201100219997. The next prime is 21201100220023. The reversal of 21201100220012 is 21002200110212.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4121517689 + ... + 4121522832.

It is an arithmetic number, because the mean of its divisors is an integer number (3096635556098).

Almost surely, 2^{21201100220012} is an apocalyptic number.

It is an amenable number.

21201100220012 is a deficient number, since it is larger than the sum of its proper divisors (15958526453164).

21201100220012 is a wasteful number, since it uses less digits than its factorization.

21201100220012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8243041168 (or 8243041166 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 21201100220012 its reverse (21002200110212), we get a palindrome (42203300330224).

The spelling of 21201100220012 in words is "twenty-one trillion, two hundred one billion, one hundred million, two hundred twenty thousand, twelve".