2021201122111 has 4 divisors (see below), whose sum is σ = 2109079431792. Its totient is φ = 1933322812432.

The previous prime is 2021201122099. The next prime is 2021201122117. The reversal of 2021201122111 is 1112211021202.

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

It is not a de Polignac number, because 2021201122111 - 2⁵ = 2021201122079 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2021201122117) 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, 43939154806 + ... + 43939154851.

It is an arithmetic number, because the mean of its divisors is an integer number (527269857948).

Almost surely, 2^{2021201122111} is an apocalyptic number.

2021201122111 is a deficient number, since it is larger than the sum of its proper divisors (87878309681).

2021201122111 is an equidigital number, since it uses as much as digits as its factorization.

2021201122111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87878309680.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 2021201122111 its reverse (1112211021202), we get a palindrome (3133412143313).

It can be divided in two parts, 202120 and 1122111, that added together give a palindrome (1324231).

The spelling of 2021201122111 in words is "two trillion, twenty-one billion, two hundred one million, one hundred twenty-two thousand, one hundred eleven".