1111211121212 has 6 divisors (see below), whose sum is σ = 1944619462128. Its totient is φ = 555605560604.

The previous prime is 1111211121121. The next prime is 1111211121221. The reversal of 1111211121212 is 2121211121111.

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 (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 138901390148 + ... + 138901390155.

It is an arithmetic number, because the mean of its divisors is an integer number (324103243688).

Almost surely, 2^{1111211121212} is an apocalyptic number.

It is an amenable number.

1111211121212 is a deficient number, since it is larger than the sum of its proper divisors (833408340916).

1111211121212 is a wasteful number, since it uses less digits than its factorization.

1111211121212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 277802780307 (or 277802780305 counting only the distinct ones).

The product of its digits is 16, while the sum is 17.

Adding to 1111211121212 its reverse (2121211121111), we get a palindrome (3232422242323).

The spelling of 1111211121212 in words is "one trillion, one hundred eleven billion, two hundred eleven million, one hundred twenty-one thousand, two hundred twelve".