111211222012 has 48 divisors (see below), whose sum is σ = 213230287872. Its totient is φ = 50332265280.

The previous prime is 111211221977. The next prime is 111211222049. The reversal of 111211222012 is 210222112111.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 25141633 + ... + 25146055.

It is an arithmetic number, because the mean of its divisors is an integer number (4442297664).

Almost surely, 2^111211222012 is an apocalyptic number.

It is an amenable number.

111211222012 is a deficient number, since it is larger than the sum of its proper divisors (102019065860).

111211222012 is a wasteful number, since it uses less digits than its factorization.

111211222012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6778 (or 6776 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 111211222012 its reverse (210222112111), we get a palindrome (321433334123).

The spelling of 111211222012 in words is "one hundred eleven billion, two hundred eleven million, two hundred twenty-two thousand, twelve".