1212201220112 has 20 divisors (see below), whose sum is σ = 2349204977196. Its totient is φ = 605954774400.

The previous prime is 1212201220103. The next prime is 1212201220127. The reversal of 1212201220112 is 2110221022121.

It can be written as a sum of positive squares in 2 ways, for example, as 204434196736 + 1007767023376 = 452144^2 + 1003876^2 .

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, 9046139 + ... + 9179162.

Almost surely, 2^{1212201220112} is an apocalyptic number.

It is an amenable number.

1212201220112 is a deficient number, since it is larger than the sum of its proper divisors (1137003757084).

1212201220112 is a wasteful number, since it uses less digits than its factorization.

1212201220112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18229466 (or 18229460 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 1212201220112 its reverse (2110221022121), we get a palindrome (3322422242233).

The spelling of 1212201220112 in words is "one trillion, two hundred twelve billion, two hundred one million, two hundred twenty thousand, one hundred twelve".