20201111011201 has 4 divisors (see below), whose sum is σ = 20897701046100. Its totient is φ = 19504520976304.

The previous prime is 20201111011187. The next prime is 20201111011219. The reversal of 20201111011201 is 10211011110202.

It is a happy number.

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 4640642266225 + 15560468744976 = 2154215^2 + 3944676^2 .

It is a cyclic number.

It is not a de Polignac number, because 20201111011201 - 2¹³ = 20201111003009 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20201111011241) 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 3 ways as a sum of consecutive naturals, for example, 348295017406 + ... + 348295017463.

It is an arithmetic number, because the mean of its divisors is an integer number (5224425261525).

Almost surely, 2^{20201111011201} is an apocalyptic number.

It is an amenable number.

20201111011201 is a deficient number, since it is larger than the sum of its proper divisors (696590034899).

20201111011201 is an equidigital number, since it uses as much as digits as its factorization.

20201111011201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 696590034898.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 20201111011201 its reverse (10211011110202), we get a palindrome (30412122121403).

Subtracting from 20201111011201 its reverse (10211011110202), we obtain a palindrome (9990099900999).

The spelling of 20201111011201 in words is "twenty trillion, two hundred one billion, one hundred eleven million, eleven thousand, two hundred one".