222222212011211 has 4 divisors (see below), whose sum is σ = 225865199093424. Its totient is φ = 218579224929000.

The previous prime is 222222212011187. The next prime is 222222212011229. The reversal of 222222212011211 is 112110212222222.

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 222222212011211 - 2³⁰ = 222221138269387 is a prime.

It is a super-2 number, since 2×222222212011211² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (222222212019211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1821493541015 + ... + 1821493541136.

It is an arithmetic number, because the mean of its divisors is an integer number (56466299773356).

Almost surely, 2^{222222212011211} is an apocalyptic number.

222222212011211 is a deficient number, since it is larger than the sum of its proper divisors (3642987082213).

222222212011211 is an equidigital number, since it uses as much as digits as its factorization.

222222212011211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3642987082212.

The product of its (nonzero) digits is 512, while the sum is 23.

Adding to 222222212011211 its reverse (112110212222222), we get a palindrome (334332424233433).

The spelling of 222222212011211 in words is "two hundred twenty-two trillion, two hundred twenty-two billion, two hundred twelve million, eleven thousand, two hundred eleven".