2111212221222 has 32 divisors (see below), whose sum is σ = 4547313584352. Its totient is φ = 649591294464.

The previous prime is 2111212221203. The next prime is 2111212221241. The reversal of 2111212221222 is 2221222121112.

It is an interprime number because it is at equal distance from previous prime (2111212221203) and next prime (2111212221241).

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

It is a congruent number.

It is an unprimeable number.

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, 4352718 + ... + 4813374.

It is an arithmetic number, because the mean of its divisors is an integer number (142103549511).

Almost surely, 2^{2111212221222} is an apocalyptic number.

2111212221222 is an abundant number, since it is smaller than the sum of its proper divisors (2436101363130).

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

2111212221222 is a wasteful number, since it uses less digits than its factorization.

2111212221222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 519432.

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

Adding to 2111212221222 its reverse (2221222121112), we get a palindrome (4332434342334).

The spelling of 2111212221222 in words is "two trillion, one hundred eleven billion, two hundred twelve million, two hundred twenty-one thousand, two hundred twenty-two".