21110220220201 has 16 divisors (see below), whose sum is σ = 24193779943680. Its totient is φ = 18043616540160.

The previous prime is 21110220220129. The next prime is 21110220220217. The reversal of 21110220220201 is 10202202201112.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 21110220220201 - 2⁷ = 21110220220073 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21110220220231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 132408205 + ... + 132567541.

It is an arithmetic number, because the mean of its divisors is an integer number (1512111246480).

Almost surely, 2^{21110220220201} is an apocalyptic number.

It is an amenable number.

21110220220201 is a deficient number, since it is larger than the sum of its proper divisors (3083559723479).

21110220220201 is a wasteful number, since it uses less digits than its factorization.

21110220220201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 212424.

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

Adding to 21110220220201 its reverse (10202202201112), we get a palindrome (31312422421313).

The spelling of 21110220220201 in words is "twenty-one trillion, one hundred ten billion, two hundred twenty million, two hundred twenty thousand, two hundred one".