2021022120111 has 16 divisors (see below), whose sum is σ = 2836739702400. Its totient is φ = 1276337180448.

The previous prime is 2021022120107. The next prime is 2021022120167. The reversal of 2021022120111 is 1110212201202.

It is not a de Polignac number, because 2021022120111 - 2² = 2021022120107 is a prime.

It is a super-2 number, since 2×2021022120111² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2021022120211) 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 15 ways as a sum of consecutive naturals, for example, 605161 + ... + 2099586.

It is an arithmetic number, because the mean of its divisors is an integer number (177296231400).

Almost surely, 2^{2021022120111} is an apocalyptic number.

2021022120111 is a deficient number, since it is larger than the sum of its proper divisors (815717582289).

2021022120111 is a wasteful number, since it uses less digits than its factorization.

2021022120111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2717878.

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

Adding to 2021022120111 its reverse (1110212201202), we get a palindrome (3131234321313).

The spelling of 2021022120111 in words is "two trillion, twenty-one billion, twenty-two million, one hundred twenty thousand, one hundred eleven".