1200021010010 has 16 divisors (see below), whose sum is σ = 2160253206216. Its totient is φ = 479960539968.

The previous prime is 1200021009989. The next prime is 1200021010021. The reversal of 1200021010010 is 100101200021.

It can be written as a sum of positive squares in 4 ways, for example, as 962170695409 + 237850314601 = 980903^2 + 487699^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 1200021010010.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 5877617 + ... + 6078356.

Almost surely, 2^{1200021010010} is an apocalyptic number.

1200021010010 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1200021010010 is a deficient number, since it is larger than the sum of its proper divisors (960232196206).

1200021010010 is a wasteful number, since it uses less digits than its factorization.

1200021010010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11966017.

The product of its (nonzero) digits is 4, while the sum is 8.

Adding to 1200021010010 its reverse (100101200021), we get a palindrome (1300122210031).

The spelling of 1200021010010 in words is "one trillion, two hundred billion, twenty-one million, ten thousand, ten".