1212221110112 has 24 divisors (see below), whose sum is σ = 2388570966936. Its totient is φ = 605599912192.

The previous prime is 1212221110103. The next prime is 1212221110129. The reversal of 1212221110112 is 2110111222121.

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 in 3 ways as a sum of consecutive naturals, for example, 15919013 + ... + 15994980.

It is an arithmetic number, because the mean of its divisors is an integer number (99523790289).

Almost surely, 2^{1212221110112} is an apocalyptic number.

It is an amenable number.

1212221110112 is a deficient number, since it is larger than the sum of its proper divisors (1176349856824).

1212221110112 is a wasteful number, since it uses less digits than its factorization.

1212221110112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31915190 (or 31915182 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 1212221110112 its reverse (2110111222121), we get a palindrome (3322332332233).

The spelling of 1212221110112 in words is "one trillion, two hundred twelve billion, two hundred twenty-one million, one hundred ten thousand, one hundred twelve".