2211112221222 has 16 divisors (see below), whose sum is σ = 4422254398272. Its totient is φ = 737032414440.

The previous prime is 2211112221217. The next prime is 2211112221229. The reversal of 2211112221222 is 2221222111122.

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2211112221229) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 223948 + ... + 2114799.

It is an arithmetic number, because the mean of its divisors is an integer number (276390899892).

Almost surely, 2^{2211112221222} is an apocalyptic number.

2211112221222 is an abundant number, since it is smaller than the sum of its proper divisors (2211142177050).

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

2211112221222 is a wasteful number, since it uses less digits than its factorization.

2211112221222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2496323.

The product of its digits is 256, while the sum is 21.

Adding to 2211112221222 its reverse (2221222111122), we get a palindrome (4432334332344).

It can be divided in two parts, 2211 and 112221222, that multiplied together give a palindrome (248121121842).

The spelling of 2211112221222 in words is "two trillion, two hundred eleven billion, one hundred twelve million, two hundred twenty-one thousand, two hundred twenty-two".