20011201110221 has 4 divisors (see below), whose sum is σ = 20014183856700. Its totient is φ = 20008218363744.

The previous prime is 20011201110211. The next prime is 20011201110247. The reversal of 20011201110221 is 12201110211002.

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 18060919034596 + 1950282075625 = 4249814^2 + 1396525^2 .

It is a cyclic number.

It is not a de Polignac number, because 20011201110221 - 2¹⁴ = 20011201093837 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 20011201110196 and 20011201110205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20011201110211) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1491363176 + ... + 1491376593.

It is an arithmetic number, because the mean of its divisors is an integer number (5003545964175).

Almost surely, 2^{20011201110221} is an apocalyptic number.

It is an amenable number.

20011201110221 is a deficient number, since it is larger than the sum of its proper divisors (2982746479).

20011201110221 is an equidigital number, since it uses as much as digits as its factorization.

20011201110221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2982746478.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 20011201110221 its reverse (12201110211002), we get a palindrome (32212311321223).

The spelling of 20011201110221 in words is "twenty trillion, eleven billion, two hundred one million, one hundred ten thousand, two hundred twenty-one".