2021221201111 has 16 divisors (see below), whose sum is σ = 2444349754368. Its totient is φ = 1633810147200.

The previous prime is 2021221201061. The next prime is 2021221201127. The reversal of 2021221201111 is 1111021221202.

It is not a de Polignac number, because 2021221201111 - 2⁹ = 2021221200599 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 (2021221207111) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 88398210 + ... + 88421071.

It is an arithmetic number, because the mean of its divisors is an integer number (152771859648).

Almost surely, 2^{2021221201111} is an apocalyptic number.

2021221201111 is a deficient number, since it is larger than the sum of its proper divisors (423128553257).

2021221201111 is a wasteful number, since it uses less digits than its factorization.

2021221201111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 176819382.

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

Adding to 2021221201111 its reverse (1111021221202), we get a palindrome (3132242422313).

The spelling of 2021221201111 in words is "two trillion, twenty-one billion, two hundred twenty-one million, two hundred one thousand, one hundred eleven".