2021221101111 has 8 divisors (see below), whose sum is σ = 2781895709184. Its totient is φ = 1304013613560.

The previous prime is 2021221101073. The next prime is 2021221101149. The reversal of 2021221101111 is 1111011221202.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (2021221101073) and next prime (2021221101149).

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

It is not a de Polignac number, because 2021221101111 - 2⁶ = 2021221101047 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2021221101511) 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 7 ways as a sum of consecutive naturals, for example, 10866780021 + ... + 10866780206.

It is an arithmetic number, because the mean of its divisors is an integer number (347736963648).

Almost surely, 2^{2021221101111} is an apocalyptic number.

2021221101111 is a deficient number, since it is larger than the sum of its proper divisors (760674608073).

2021221101111 is a wasteful number, since it uses less digits than its factorization.

2021221101111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21733560261.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 2021221101111 its reverse (1111011221202), we get a palindrome (3132232322313).

The spelling of 2021221101111 in words is "two trillion, twenty-one billion, two hundred twenty-one million, one hundred one thousand, one hundred eleven".