1212112012312 has 8 divisors (see below), whose sum is σ = 2272710023100. Its totient is φ = 606056006152.

The previous prime is 1212112012253. The next prime is 1212112012313. The reversal of 1212112012312 is 2132102112121.

It is a tau number, because it is divible by the number of its divisors (8).

It is a self number, because there is not a number n which added to its sum of digits gives 1212112012312.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1212112012313) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 75757000762 + ... + 75757000777.

Almost surely, 2^{1212112012312} is an apocalyptic number.

It is an amenable number.

1212112012312 is a deficient number, since it is larger than the sum of its proper divisors (1060598010788).

1212112012312 is a wasteful number, since it uses less digits than its factorization.

1212112012312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 151514001545 (or 151514001541 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 19.

Adding to 1212112012312 its reverse (2132102112121), we get a palindrome (3344214124433).

The spelling of 1212112012312 in words is "one trillion, two hundred twelve billion, one hundred twelve million, twelve thousand, three hundred twelve".