1212205016412 has 216 divisors, whose sum is σ = 3515747521104. Its totient is φ = 350791354368.

The previous prime is 1212205016359. The next prime is 1212205016431. The reversal of 1212205016412 is 2146105022121.

It is a happy number.

1212205016412 is a `hidden beast` number, since 1 + 2 + 12 + 2 + 0 + 5 + 0 + 1 + 641 + 2 = 666.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 179237343 + ... + 179244105.

It is an arithmetic number, because the mean of its divisors is an integer number (16276608894).

Almost surely, 2^{1212205016412} is an apocalyptic number.

1212205016412 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1212205016412, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1757873760552).

1212205016412 is an abundant number, since it is smaller than the sum of its proper divisors (2303542504692).

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

1212205016412 is a wasteful number, since it uses less digits than its factorization.

1212205016412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8549 (or 8531 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 27.

The spelling of 1212205016412 in words is "one trillion, two hundred twelve billion, two hundred five million, sixteen thousand, four hundred twelve".