1111212122212 has 12 divisors (see below), whose sum is σ = 1944898551036. Its totient is φ = 555526821920.

The previous prime is 1111212122197. The next prime is 1111212122243. The reversal of 1111212122212 is 2122212121111.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 966792361536 + 144419760676 = 983256^2 + 380026^2 .

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

It is a self number, because there is not a number n which added to its sum of digits gives 1111212122212.

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, 19778239 + ... + 19834342.

It is an arithmetic number, because the mean of its divisors is an integer number (162074879253).

Almost surely, 2^{1111212122212} is an apocalyptic number.

It is an amenable number.

1111212122212 is a deficient number, since it is larger than the sum of its proper divisors (833686428824).

1111212122212 is a wasteful number, since it uses less digits than its factorization.

1111212122212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39619598 (or 39619596 counting only the distinct ones).

The product of its digits is 64, while the sum is 19.

Adding to 1111212122212 its reverse (2122212121111), we get a palindrome (3233424243323).

The spelling of 1111212122212 in words is "one trillion, one hundred eleven billion, two hundred twelve million, one hundred twenty-two thousand, two hundred twelve".