2221012111 has 4 divisors (see below), whose sum is σ = 2221125400. Its totient is φ = 2220898824.

The previous prime is 2221012103. The next prime is 2221012139. The reversal of 2221012111 is 1112101222.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 2221012111 - 2³ = 2221012103 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2221012091 and 2221012100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2221012811) 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, 18816 + ... + 69253.

It is an arithmetic number, because the mean of its divisors is an integer number (555281350).

Almost surely, 2^2221012111 is an apocalyptic number.

2221012111 is a deficient number, since it is larger than the sum of its proper divisors (113289).

2221012111 is an equidigital number, since it uses as much as digits as its factorization.

2221012111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 113288.

The product of its (nonzero) digits is 16, while the sum is 13.

The square root of 2221012111 is about 47127.6151635111. The cubic root of 2221012111 is about 1304.7189661172.

Adding to 2221012111 its reverse (1112101222), we get a palindrome (3333113333).

The spelling of 2221012111 in words is "two billion, two hundred twenty-one million, twelve thousand, one hundred eleven".