20212221110201 has 4 divisors (see below), whose sum is σ = 21401175293172. Its totient is φ = 19023266927232.

The previous prime is 20212221110143. The next prime is 20212221110219. The reversal of 20212221110201 is 10201112221202.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 17411016367801 + 2801204742400 = 4172651^2 + 1673680^2 .

It is a cyclic number.

It is not a de Polignac number, because 20212221110201 - 2¹⁴ = 20212221093817 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (17), and also a Moran number because the ratio is a prime number: 1188954182953 = 20212221110201 / (2 + 0 + 2 + 1 + 2 + 2 + 2 + 1 + 1 + 1 + 0 + 2 + 0 + 1).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20212221110201.

It is not an unprimeable number, because it can be changed into a prime (20212221110231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 594477091460 + ... + 594477091493.

It is an arithmetic number, because the mean of its divisors is an integer number (5350293823293).

Almost surely, 2^{20212221110201} is an apocalyptic number.

It is an amenable number.

20212221110201 is a deficient number, since it is larger than the sum of its proper divisors (1188954182971).

20212221110201 is a wasteful number, since it uses less digits than its factorization.

20212221110201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1188954182970.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 20212221110201 its reverse (10201112221202), we get a palindrome (30413333331403).

The spelling of 20212221110201 in words is "twenty trillion, two hundred twelve billion, two hundred twenty-one million, one hundred ten thousand, two hundred one".