1212200030312 has 32 divisors (see below), whose sum is σ = 2511207230400. Its totient is φ = 545645025024.

The previous prime is 1212200030263. The next prime is 1212200030317. The reversal of 1212200030312 is 2130300022121.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is not an unprimeable number, because it can be changed into a prime (1212200030317) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 193762862 + ... + 193769117.

It is an arithmetic number, because the mean of its divisors is an integer number (78475225950).

Almost surely, 2^{1212200030312} is an apocalyptic number.

It is an amenable number.

1212200030312 is an abundant number, since it is smaller than the sum of its proper divisors (1299007200088).

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

1212200030312 is a wasteful number, since it uses less digits than its factorization.

1212200030312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 387532025 (or 387532021 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 1212200030312 its reverse (2130300022121), we get a palindrome (3342500052433).

The spelling of 1212200030312 in words is "one trillion, two hundred twelve billion, two hundred million, thirty thousand, three hundred twelve".