221211101112222 has 32 divisors (see below), whose sum is σ = 491824185108480. Its totient is φ = 65869310504160.

The previous prime is 221211101112217. The next prime is 221211101112227. The reversal of 221211101112222 is 222211101112122.

It is an interprime number because it is at equal distance from previous prime (221211101112217) and next prime (221211101112227).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221211101112227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 45742574322 + ... + 45742579157.

It is an arithmetic number, because the mean of its divisors is an integer number (15369505784640).

Almost surely, 2^{221211101112222} is an apocalyptic number.

221211101112222 is an abundant number, since it is smaller than the sum of its proper divisors (270613083996258).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

221211101112222 is a wasteful number, since it uses less digits than its factorization.

221211101112222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91485153528.

The product of its (nonzero) digits is 128, while the sum is 21.

Adding to 221211101112222 its reverse (222211101112122), we get a palindrome (443422202224344).

The spelling of 221211101112222 in words is "two hundred twenty-one trillion, two hundred eleven billion, one hundred one million, one hundred twelve thousand, two hundred twenty-two".