1000001220012 has 36 divisors (see below), whose sum is σ = 2528950785816. Its totient is φ = 333179464320.

The previous prime is 1000001220011. The next prime is 1000001220073. The reversal of 1000001220012 is 2100221000001.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a junction number, because it is equal to n+sod(n) for n = 1000001219976 and 1000001220003.

It is not an unprimeable number, because it can be changed into a prime (1000001220011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6349278 + ... + 6504869.

Almost surely, 2^{1000001220012} is an apocalyptic number.

1000001220012 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1000001220012 is an abundant number, since it is smaller than the sum of its proper divisors (1528949565804).

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

1000001220012 is a wasteful number, since it uses less digits than its factorization.

1000001220012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12856318 (or 12856313 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

Adding to 1000001220012 its reverse (2100221000001), we get a palindrome (3100222220013).

The spelling of 1000001220012 in words is "one trillion, one million, two hundred twenty thousand, twelve".