2021111222111 has 8 divisors (see below), whose sum is σ = 2049712128000. Its totient is φ = 1992514053880.

The previous prime is 2021111222087. The next prime is 2021111222177. The reversal of 2021111222111 is 1112221111202.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2021111222111 - 2³⁰ = 2020037480287 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2021111222111.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2021111228111) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 163790 + ... + 2017188.

It is an arithmetic number, because the mean of its divisors is an integer number (256214016000).

Almost surely, 2^{2021111222111} is an apocalyptic number.

2021111222111 is a deficient number, since it is larger than the sum of its proper divisors (28600905889).

2021111222111 is a wasteful number, since it uses less digits than its factorization.

2021111222111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1868829.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 2021111222111 its reverse (1112221111202), we get a palindrome (3133332333313).

The spelling of 2021111222111 in words is "two trillion, twenty-one billion, one hundred eleven million, two hundred twenty-two thousand, one hundred eleven".