1212100222012 has 12 divisors (see below), whose sum is σ = 2136658421520. Its totient is φ = 601626387296.

The previous prime is 1212100221979. The next prime is 1212100222171. The reversal of 1212100222012 is 2102220012121.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1105930312 + ... + 1105931407.

It is an arithmetic number, because the mean of its divisors is an integer number (178054868460).

Almost surely, 2^{1212100222012} is an apocalyptic number.

It is an amenable number.

1212100222012 is a deficient number, since it is larger than the sum of its proper divisors (924558199508).

1212100222012 is a wasteful number, since it uses less digits than its factorization.

1212100222012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2211861860 (or 2211861858 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 1212100222012 its reverse (2102220012121), we get a palindrome (3314320234133).

The spelling of 1212100222012 in words is "one trillion, two hundred twelve billion, one hundred million, two hundred twenty-two thousand, twelve".