1222111111012 has 24 divisors (see below), whose sum is σ = 2333274172992. Its totient is φ = 555468631200.

The previous prime is 1222111111007. The next prime is 1222111111061. The reversal of 1222111111012 is 2101111112221.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 225939 + ... + 1579642.

It is an arithmetic number, because the mean of its divisors is an integer number (97219757208).

Almost surely, 2^{1222111111012} is an apocalyptic number.

It is an amenable number.

1222111111012 is a deficient number, since it is larger than the sum of its proper divisors (1111163061980).

1222111111012 is a wasteful number, since it uses less digits than its factorization.

1222111111012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1820979 (or 1820977 counting only the distinct ones).

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

Adding to 1222111111012 its reverse (2101111112221), we get a palindrome (3323222223233).

The spelling of 1222111111012 in words is "one trillion, two hundred twenty-two billion, one hundred eleven million, one hundred eleven thousand, twelve".