2211221222212 has 12 divisors (see below), whose sum is σ = 3964018532796. Its totient is φ = 1078644498560.

The previous prime is 2211221222131. The next prime is 2211221222239. The reversal of 2211221222212 is 2122221221122.

It can be written as a sum of positive squares in 2 ways, for example, as 162017520196 + 2049203702016 = 402514^2 + 1431504^2 .

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

It is an unprimeable number.

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, 6741527953 + ... + 6741528280.

It is an arithmetic number, because the mean of its divisors is an integer number (330334877733).

Almost surely, 2^{2211221222212} is an apocalyptic number.

It is an amenable number.

2211221222212 is a deficient number, since it is larger than the sum of its proper divisors (1752797310584).

2211221222212 is a wasteful number, since it uses less digits than its factorization.

2211221222212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13483056278 (or 13483056276 counting only the distinct ones).

The product of its digits is 512, while the sum is 22.

Adding to 2211221222212 its reverse (2122221221122), we get a palindrome (4333442443334).

The spelling of 2211221222212 in words is "two trillion, two hundred eleven billion, two hundred twenty-one million, two hundred twenty-two thousand, two hundred twelve".