11112222120212 has 12 divisors (see below), whose sum is σ = 19447485703380. Its totient is φ = 5555797633536.

The previous prime is 11112222120193. The next prime is 11112222120217. The reversal of 11112222120212 is 21202122221111.

It can be written as a sum of positive squares in 2 ways, for example, as 7106724232336 + 4005497887876 = 2665844^2 + 2001374^2 .

It is a super-3 number, since 3×11112222120212³ (a number of 40 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11112222120217) by changing a digit.

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, 78276863 + ... + 78418694.

It is an arithmetic number, because the mean of its divisors is an integer number (1620623808615).

Almost surely, 2^{11112222120212} is an apocalyptic number.

It is an amenable number.

11112222120212 is a deficient number, since it is larger than the sum of its proper divisors (8335263583168).

11112222120212 is a wasteful number, since it uses less digits than its factorization.

11112222120212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 156713290 (or 156713288 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 20.

Adding to 11112222120212 its reverse (21202122221111), we get a palindrome (32314344341323).

The spelling of 11112222120212 in words is "eleven trillion, one hundred twelve billion, two hundred twenty-two million, one hundred twenty thousand, two hundred twelve".