20201022111 has 4 divisors (see below), whose sum is σ = 26934696152. Its totient is φ = 13467348072.

The previous prime is 20201022103. The next prime is 20201022173. The reversal of 20201022111 is 11122010202.

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

It is not a de Polignac number, because 20201022111 - 2³ = 20201022103 is a prime.

It is a super-2 number, since 2×20201022111² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20201022181) 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, 3366837016 + ... + 3366837021.

It is an arithmetic number, because the mean of its divisors is an integer number (6733674038).

Almost surely, 2^20201022111 is an apocalyptic number.

20201022111 is a deficient number, since it is larger than the sum of its proper divisors (6733674041).

20201022111 is an equidigital number, since it uses as much as digits as its factorization.

20201022111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6733674040.

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

Adding to 20201022111 its reverse (11122010202), we get a palindrome (31323032313).

The spelling of 20201022111 in words is "twenty billion, two hundred one million, twenty-two thousand, one hundred eleven".