1212021001012 has 12 divisors (see below), whose sum is σ = 2121396473700. Its totient is φ = 605907722816.

The previous prime is 1212021001007. The next prime is 1212021001039. The reversal of 1212021001012 is 2101001202121.

It can be written as a sum of positive squares in 2 ways, for example, as 468518346256 + 743502654756 = 684484^2 + 862266^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1212021000983 and 1212021001001.

It is a congruent number.

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, 25667887 + ... + 25715062.

It is an arithmetic number, because the mean of its divisors is an integer number (176783039475).

Almost surely, 2^{1212021001012} is an apocalyptic number.

It is an amenable number.

1212021001012 is a deficient number, since it is larger than the sum of its proper divisors (909375472688).

1212021001012 is a wasteful number, since it uses less digits than its factorization.

1212021001012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51388850 (or 51388848 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 1212021001012 its reverse (2101001202121), we get a palindrome (3313022203133).

The spelling of 1212021001012 in words is "one trillion, two hundred twelve billion, twenty-one million, one thousand, twelve".