1212100111122 has 16 divisors (see below), whose sum is σ = 2434259147232. Its totient is φ = 402356882880.

The previous prime is 1212100111093. The next prime is 1212100111147. The reversal of 1212100111122 is 2211110012121.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 419120308 + ... + 419123199.

It is an arithmetic number, because the mean of its divisors is an integer number (152141196702).

Almost surely, 2^{1212100111122} is an apocalyptic number.

1212100111122 is an abundant number, since it is smaller than the sum of its proper divisors (1222159036110).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1212100111122 is a wasteful number, since it uses less digits than its factorization.

1212100111122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 838243753.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 1212100111122 its reverse (2211110012121), we get a palindrome (3423210123243).

Subtracting 1212100111122 from its reverse (2211110012121), we obtain a palindrome (999009900999).

The spelling of 1212100111122 in words is "one trillion, two hundred twelve billion, one hundred million, one hundred eleven thousand, one hundred twenty-two".