1212120222112 has 24 divisors (see below), whose sum is σ = 2526735905316. Its totient is φ = 570409516032.

The previous prime is 1212120222109. The next prime is 1212120222121. The reversal of 1212120222112 is 2112220212121.

It can be written as a sum of positive squares in 2 ways, for example, as 1045391733136 + 166728488976 = 1022444^2 + 408324^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 1212120222112.

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, 1114080543 + ... + 1114081630.

Almost surely, 2^{1212120222112} is an apocalyptic number.

It is an amenable number.

1212120222112 is an abundant number, since it is smaller than the sum of its proper divisors (1314615683204).

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

1212120222112 is a wasteful number, since it uses less digits than its factorization.

1212120222112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2228162200 (or 2228162192 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 1212120222112 its reverse (2112220212121), we get a palindrome (3324340434233).

Subtracting 1212120222112 from its reverse (2112220212121), we obtain a palindrome (900099990009).

The spelling of 1212120222112 in words is "one trillion, two hundred twelve billion, one hundred twenty million, two hundred twenty-two thousand, one hundred twelve".