11211111222212 has 24 divisors (see below), whose sum is σ = 21484410881472. Its totient is φ = 5076583368800.

The previous prime is 11211111222191. The next prime is 11211111222293. The reversal of 11211111222212 is 21222211111211.

It is a happy number.

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 (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 484395239 + ... + 484418382.

It is an arithmetic number, because the mean of its divisors is an integer number (895183786728).

Almost surely, 2^{11211111222212} is an apocalyptic number.

It is an amenable number.

11211111222212 is a deficient number, since it is larger than the sum of its proper divisors (10273299659260).

11211111222212 is a wasteful number, since it uses less digits than its factorization.

11211111222212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 968813899 (or 968813897 counting only the distinct ones).

The product of its digits is 64, while the sum is 20.

Adding to 11211111222212 its reverse (21222211111211), we get a palindrome (32433322333423).

The spelling of 11211111222212 in words is "eleven trillion, two hundred eleven billion, one hundred eleven million, two hundred twenty-two thousand, two hundred twelve".