11111122012 has 6 divisors (see below), whose sum is σ = 19444463528. Its totient is φ = 5555561004.

The previous prime is 11111122007. The next prime is 11111122039. The reversal of 11111122012 is 21022111111.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 11111121983 and 11111122001.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1388890248 + ... + 1388890255.

Almost surely, 2^11111122012 is an apocalyptic number.

It is an amenable number.

11111122012 is a deficient number, since it is larger than the sum of its proper divisors (8333341516).

11111122012 is a wasteful number, since it uses less digits than its factorization.

11111122012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2777780507 (or 2777780505 counting only the distinct ones).

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

Adding to 11111122012 its reverse (21022111111), we get a palindrome (32133233123).

The spelling of 11111122012 in words is "eleven billion, one hundred eleven million, one hundred twenty-two thousand, twelve".