11111201212 has 12 divisors (see below), whose sum is σ = 19552032136. Its totient is φ = 5524906320.

The previous prime is 11111201209. The next prime is 11111201219. The reversal of 11111201212 is 21210211111.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 11111201192 and 11111201201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11111201219) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 7672758 + ... + 7674205.

Almost surely, 2^11111201212 is an apocalyptic number.

It is an amenable number.

11111201212 is a deficient number, since it is larger than the sum of its proper divisors (8440830924).

11111201212 is a wasteful number, since it uses less digits than its factorization.

11111201212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15347148 (or 15347146 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 11111201212 its reverse (21210211111), we get a palindrome (32321412323).

The spelling of 11111201212 in words is "eleven billion, one hundred eleven million, two hundred one thousand, two hundred twelve".