2221021021111 has 4 divisors (see below), whose sum is σ = 2222270894032. Its totient is φ = 2219771148192.

The previous prime is 2221021021081. The next prime is 2221021021169. The reversal of 2221021021111 is 1111201201222.

2221021021111 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 2221021021111 - 2⁹ = 2221021020599 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 (2221021021181) 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, 624933795 + ... + 624937348.

It is an arithmetic number, because the mean of its divisors is an integer number (555567723508).

Almost surely, 2^{2221021021111} is an apocalyptic number.

2221021021111 is a deficient number, since it is larger than the sum of its proper divisors (1249872921).

2221021021111 is a wasteful number, since it uses less digits than its factorization.

2221021021111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1249872920.

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

Adding to 2221021021111 its reverse (1111201201222), we get a palindrome (3332222222333).

The spelling of 2221021021111 in words is "two trillion, two hundred twenty-one billion, twenty-one million, twenty-one thousand, one hundred eleven".