201020021022111 has 4 divisors (see below), whose sum is σ = 268026694696152. Its totient is φ = 134013347348072.

The previous prime is 201020021022059. The next prime is 201020021022137. The reversal of 201020021022111 is 111220120020102.

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

It is a cyclic number.

It is not a de Polignac number, because 201020021022111 - 2¹⁵ = 201020020989343 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201020021022211) 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, 33503336837016 + ... + 33503336837021.

It is an arithmetic number, because the mean of its divisors is an integer number (67006673674038).

Almost surely, 2^{201020021022111} is an apocalyptic number.

201020021022111 is a deficient number, since it is larger than the sum of its proper divisors (67006673674041).

201020021022111 is an equidigital number, since it uses as much as digits as its factorization.

201020021022111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67006673674040.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 201020021022111 its reverse (111220120020102), we get a palindrome (312240141042213).

The spelling of 201020021022111 in words is "two hundred one trillion, twenty billion, twenty-one million, twenty-two thousand, one hundred eleven".