222122111221111 has 4 divisors (see below), whose sum is σ = 226313094451752. Its totient is φ = 217931127990472.

The previous prime is 222122111221079. The next prime is 222122111221117. The reversal of 222122111221111 is 111122111221222.

222122111221111 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 222122111221111 - 2⁵ = 222122111221079 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 (222122111221117) 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, 2095491615241 + ... + 2095491615346.

It is an arithmetic number, because the mean of its divisors is an integer number (56578273612938).

Almost surely, 2^{222122111221111} is an apocalyptic number.

222122111221111 is a deficient number, since it is larger than the sum of its proper divisors (4190983230641).

222122111221111 is an equidigital number, since it uses as much as digits as its factorization.

222122111221111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4190983230640.

The product of its digits is 128, while the sum is 22.

Adding to 222122111221111 its reverse (111122111221222), we get a palindrome (333244222442333).

It can be divided in two parts, 222122111 and 221111, that added together give a palindrome (222343222).

The spelling of 222122111221111 in words is "two hundred twenty-two trillion, one hundred twenty-two billion, one hundred eleven million, two hundred twenty-one thousand, one hundred eleven".