21112221110201 has 16 divisors (see below), whose sum is σ = 22777099625280. Its totient is φ = 19453183093440.

The previous prime is 21112221110179. The next prime is 21112221110203. The reversal of 21112221110201 is 10201112221112.

It is a cyclic number.

It is not a de Polignac number, because 21112221110201 - 2⁶ = 21112221110137 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21112221110201.

It is not an unprimeable number, because it can be changed into a prime (21112221110203) 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, 205855331 + ... + 205957863.

It is an arithmetic number, because the mean of its divisors is an integer number (1423568726580).

Almost surely, 2^{21112221110201} is an apocalyptic number.

It is an amenable number.

21112221110201 is a deficient number, since it is larger than the sum of its proper divisors (1664878515079).

21112221110201 is a wasteful number, since it uses less digits than its factorization.

21112221110201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 130856.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 21112221110201 its reverse (10201112221112), we get a palindrome (31313333331313).

The spelling of 21112221110201 in words is "twenty-one trillion, one hundred twelve billion, two hundred twenty-one million, one hundred ten thousand, two hundred one".