201020020021011 has 4 divisors (see below), whose sum is σ = 268026693361352. Its totient is φ = 134013346680672.

The previous prime is 201020020020991. The next prime is 201020020021049. The reversal of 201020020021011 is 110120020020102.

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

It is not a de Polignac number, because 201020020021011 - 2¹⁵ = 201020019988243 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (201020020021111) 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, 33503336670166 + ... + 33503336670171.

It is an arithmetic number, because the mean of its divisors is an integer number (67006673340338).

Almost surely, 2^{201020020021011} is an apocalyptic number.

201020020021011 is a deficient number, since it is larger than the sum of its proper divisors (67006673340341).

201020020021011 is an equidigital number, since it uses as much as digits as its factorization.

201020020021011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67006673340340.

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 201020020021011 its reverse (110120020020102), we get a palindrome (311140040041113).

Subtracting from 201020020021011 its reverse (110120020020102), we obtain a palindrome (90900000000909).

The spelling of 201020020021011 in words is "two hundred one trillion, twenty billion, twenty million, twenty-one thousand, eleven".