200001021012 has 72 divisors (see below), whose sum is σ = 550060206696. Its totient is φ = 60904341504.

The previous prime is 200001021007. The next prime is 200001021049. The reversal of 200001021012 is 210120100002.

200001021012 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 4667075856 + 195333945156 = 68316^2 + 441966^2 .

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 = 200001020985 and 200001021003.

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 23 ways as a sum of consecutive naturals, for example, 2157453 + ... + 2248244.

It is an arithmetic number, because the mean of its divisors is an integer number (7639725093).

Almost surely, 2^200001021012 is an apocalyptic number.

It is an amenable number.

200001021012 is an abundant number, since it is smaller than the sum of its proper divisors (350059185684).

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

200001021012 is a wasteful number, since it uses less digits than its factorization.

200001021012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4405817 (or 4405812 counting only the distinct ones).

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

Adding to 200001021012 its reverse (210120100002), we get a palindrome (410121121014).

The spelling of 200001021012 in words is "two hundred billion, one million, twenty-one thousand, twelve".