222112100221111 has 4 divisors (see below), whose sum is σ = 229771138159800. Its totient is φ = 214453062282424.

The previous prime is 222112100221093. The next prime is 222112100221147. The reversal of 222112100221111 is 111122001211222.

It is a happy number.

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 222112100221111 - 2²⁷ = 222111966003383 is a prime.

It is a super-4 number, since 4×222112100221111⁴ (a number of 58 digits) contains 4444 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222112100221211) 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, 3829518969301 + ... + 3829518969358.

It is an arithmetic number, because the mean of its divisors is an integer number (57442784539950).

Almost surely, 2^{222112100221111} is an apocalyptic number.

222112100221111 is a deficient number, since it is larger than the sum of its proper divisors (7659037938689).

222112100221111 is an equidigital number, since it uses as much as digits as its factorization.

222112100221111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7659037938688.

The product of its (nonzero) digits is 64, while the sum is 19.

Adding to 222112100221111 its reverse (111122001211222), we get a palindrome (333234101432333).

The spelling of 222112100221111 in words is "two hundred twenty-two trillion, one hundred twelve billion, one hundred million, two hundred twenty-one thousand, one hundred eleven".